{"id":398620,"date":"2025-09-11T05:23:23","date_gmt":"2025-09-11T09:23:23","guid":{"rendered":"https:\/\/www.macobserver.com\/non-categorise\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/"},"modified":"2025-09-11T07:20:23","modified_gmt":"2025-09-11T11:20:23","slug":"comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes","status":"publish","type":"post","link":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/","title":{"rendered":"Comment r\u00e9trograder d&rsquo;iOS 26 vers iOS 18 en toute s\u00e9curit\u00e9 : 5 m\u00e9thodes"},"content":{"rendered":"\n<p>Tout le monde n&rsquo;aime pas vivre \u00e0 la pointe de la technologie logicielle. Peut-\u00eatre qu&rsquo;iOS 26 a cass\u00e9 une application sur laquelle vous comptez, ou que l&rsquo;autonomie de la batterie ne tient pas le coup. La bonne nouvelle est que vous pouvez revenir \u00e0 iOS 18, si Apple le signe encore.   <\/p>\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table des mati\u00e8res<\/h2><ul><li><a  href=\"#h-can-i-downgrade-from-ios-26-to-ios-18-on-iphone-and-ipad\" data-level=\"2\">Puis-je r\u00e9trograder d&rsquo;iOS 26 vers iOS 18 sur iPhone et iPad ?<\/a><\/li><li><a  href=\"#h-before-you-start\" data-level=\"2\">Avant de commencer<\/a><\/li><li><a  href=\"#h-method-1-downgrade-using-finder-or-itunes-ipsw-file\" data-level=\"2\">M\u00e9thode 1 : R\u00e9trograder en utilisant Finder ou iTunes (fichier IPSW)<\/a><\/li><li><a  href=\"#h-method-2-you-re-on-the-beta-and-just-want-off-it-no-computer\" data-level=\"2\">M\u00e9thode 2 : Vous \u00eates sur la b\u00eata et voulez simplement en sortir (sans ordinateur)<\/a><\/li><li><a  href=\"#h-method-3-the-fastest-rollback-accept-data-loss\" data-level=\"2\">M\u00e9thode 3 : Le retour en arri\u00e8re \u00ab le plus rapide \u00bb (accepter la perte de donn\u00e9es)<\/a><\/li><li><a  href=\"#h-method-4-use-specialized-third-party-software\" data-level=\"2\">M\u00e9thode 4 : Utiliser un logiciel tiers sp\u00e9cialis\u00e9<\/a><\/li><li><a  href=\"#h-method-5-advanced-unsupported-path-to-keep-more-data-at-your-risk\" data-level=\"2\">M\u00e9thode 5 : Chemin avanc\u00e9, non pris en charge pour conserver plus de donn\u00e9es (\u00e0 vos risques)<\/a><\/li><li><a  href=\"#h-troubleshooting\" data-level=\"2\">D\u00e9pannage<\/a><\/li><li><a  href=\"#h-conclusion\" data-level=\"2\">Conclusion<\/a><\/li><\/ul><\/div>\n\n<h2 class=\"wp-block-heading\" id=\"h-can-i-downgrade-from-ios-26-to-ios-18-on-iphone-and-ipad\">Puis-je r\u00e9trograder d&rsquo;iOS 26 vers iOS 18 sur iPhone et iPad ?<\/h2>\n\n<p>Oui, mais seulement sous certaines conditions. Apple contr\u00f4le quelles versions d&rsquo;iOS et iPadOS peuvent \u00eatre install\u00e9es en \u00ab signant \u00bb le firmware. Si iOS 18 (ou une mise \u00e0 jour ponctuelle comme iOS 18.6) est encore sign\u00e9, vous pouvez r\u00e9trograder en toute s\u00e9curit\u00e9. S&rsquo;il n&rsquo;est plus sign\u00e9, la r\u00e9trogradation n&rsquo;est pas possible, sauf vers la derni\u00e8re version iOS qu&rsquo;Apple signe actuellement.   <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-before-you-start\">Avant de commencer<\/h2>\n\n<p>La r\u00e9trogradation efface votre iPhone ou iPad. Voici ce qu&rsquo;il faut faire en premier : <\/p>\n\n<ol class=\"wp-block-list\">\n<li><strong><a  href=\"https:\/\/www.macobserver.com\/tips\/how-to\/back-up-your-iphone-to-a-mac-or-pc-computer\/\">Sauvegardez vos donn\u00e9es<\/a><\/strong> \u2014 Utilisez iCloud ou Finder\/iTunes. Gardez \u00e0 l&rsquo;esprit que les sauvegardes faites sur iOS 26 ne se restaureront pas enti\u00e8rement sur iOS 18. <\/li>\n\n\n\n<li><strong><a  href=\"https:\/\/support.apple.com\/guide\/icloud\/remove-devices-and-items-from-find-my-mmdc23b125f6\/icloud\">D\u00e9sactivez Localiser mon iPhone\/iPad<\/a><\/strong> \u2014 Allez dans <strong>R\u00e9glages &gt; [Votre nom] &gt; Localiser &gt; Localiser mon iPhone<\/strong>, d\u00e9sactivez-le et saisissez votre mot de passe Apple ID.<\/li>\n\n\n\n<li><strong>Chargez votre appareil<\/strong> \u2014 Assurez-vous que la batterie soit au moins \u00e0 60-70 %.<\/li>\n\n\n\n<li><strong>Procurez-vous un c\u00e2ble fiable et une connexion internet stable<\/strong> \u2014 Vous aurez besoin des deux pour t\u00e9l\u00e9charger et restaurer le firmware.<\/li>\n\n\n\n<li><strong>T\u00e9l\u00e9chargez le fichier IPSW<\/strong> \u2014 Visitez <a  href=\"https:\/\/ipsw.me\/product\/iPhone\">ipsw.me<\/a>, choisissez votre mod\u00e8le d&rsquo;iPhone ou iPad, et t\u00e9l\u00e9chargez l&rsquo;IPSW iOS 18 sign\u00e9.<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\" id=\"h-method-1-downgrade-using-finder-or-itunes-ipsw-file\">M\u00e9thode 1 : r\u00e9trograder en utilisant Finder ou iTunes (fichier IPSW)<\/h2>\n\n<p>C&rsquo;est la fa\u00e7on la plus directe de revenir en arri\u00e8re.<\/p>\n\n<ol class=\"wp-block-list\">\n<li>Connectez votre iPhone ou iPad \u00e0 votre Mac ou PC avec un c\u00e2ble.<\/li>\n\n\n\n<li>Ouvrez <strong>Finder<\/strong> (macOS Catalina ou plus r\u00e9cent) ou <strong>iTunes<\/strong> (Windows\/macOS plus ancien).<\/li>\n\n\n\n<li>Mettez votre appareil en mode r\u00e9cup\u00e9ration :\n<ul class=\"wp-block-list\">\n<li><strong>iPhone 8 et plus r\u00e9cent<\/strong> : Appuyez sur Volume +, puis Volume -, puis maintenez le bouton lat\u00e9ral.<\/li>\n\n\n\n<li><strong>iPhone 7\/7 Plus<\/strong> : Maintenez Lat\u00e9ral + Volume -.<\/li>\n\n\n\n<li><strong>iPhone 6s ou ant\u00e9rieur<\/strong> : Maintenez Accueil + bouton Lat\u00e9ral\/Sup\u00e9rieur.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Dans Finder\/iTunes, s\u00e9lectionnez votre appareil.<\/li>\n\n\n\n<li>Maintenez <strong>Option (Mac)<\/strong> ou <strong>Maj (Windows)<\/strong> et cliquez sur <strong>Restaurer iPhone\/iPad<\/strong>.<\/li>\n\n\n\n<li>Choisissez l&rsquo;IPSW iOS 18 que vous avez t\u00e9l\u00e9charg\u00e9.<\/li>\n\n\n\n<li>Attendez 10 \u00e0 30 minutes que le processus se termine. Votre appareil red\u00e9marrera avec iOS 18. <\/li>\n<\/ol>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"597\" src=\"https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-1024x597.png\" alt=\"restaurer iphone dans finder\" class=\"wp-image-398438\" style=\"width:648px;height:auto\" srcset=\"https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-1024x597.png 1024w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-300x175.png 300w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-768x448.png 768w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-1536x896.png 1536w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-330x193.png 330w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-400x233.png 400w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-600x350.png 600w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28-1200x700.png 1200w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/image-28.png 1560w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\" id=\"h-method-2-you-re-on-the-beta-and-just-want-off-it-no-computer\">M\u00e9thode 2 : vous \u00eates sur la <strong>b\u00eata<\/strong> et voulez simplement en sortir (sans ordinateur)<\/h2>\n\n<p>Vous <strong>ne pouvez pas<\/strong> vraiment r\u00e9trograder sans ordinateur, mais vous <strong>pouvez<\/strong> quitter le canal b\u00eata pour arr\u00eater de recevoir les versions b\u00eata.<\/p>\n\n<ol class=\"wp-block-list\">\n<li>R\u00e9glages \u2192 G\u00e9n\u00e9ral \u2192 <strong>mise \u00e0 jour logicielle<\/strong> \u2192 <strong>mises \u00e0 jour b\u00eata<\/strong> \u2192 <strong>d\u00e9sactiv\u00e9<\/strong>.<\/li>\n\n\n\n<li>Restez sur votre version actuelle jusqu&rsquo;\u00e0 ce que la prochaine version <strong>publique<\/strong> apparaisse, puis mettez \u00e0 jour normalement.<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\" id=\"h-method-3-the-fastest-rollback-accept-data-loss\">M\u00e9thode 3 : le retour en arri\u00e8re \u00ab le plus rapide \u00bb (accepter la perte de donn\u00e9es)<\/h2>\n\n<p>Si vous n&rsquo;avez pas besoin de vos donn\u00e9es de l&rsquo;\u00e8re iOS 26 :<\/p>\n\n<ol class=\"wp-block-list\">\n<li>D\u00e9sinscrivez-vous de la b\u00eata (si applicable) comme ci-dessus.<\/li>\n\n\n\n<li>Utilisez la <strong>M\u00e9thode 1<\/strong> pour restaurer iOS 18 via IPSW.<\/li>\n\n\n\n<li>Configurez comme <strong>nouveau<\/strong> ou restaurez une sauvegarde d&rsquo;<strong>avant<\/strong> d&rsquo;avoir install\u00e9 iOS 26.<\/li>\n<\/ol>\n\n<p>C&rsquo;est la voie la moins compliqu\u00e9e, soyez juste honn\u00eate avec vous-m\u00eame sur les donn\u00e9es que vous perdrez.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-method-4-use-specialized-third-party-software\">M\u00e9thode 4 : utiliser un logiciel tiers sp\u00e9cialis\u00e9<\/h2>\n\n<p>Une application sp\u00e9cialis\u00e9e peut \u00eatre tr\u00e8s utile lorsque vous pr\u00e9voyez de r\u00e9trograder votre syst\u00e8me d&rsquo;exploitation. Par exemple, vous pouvez utiliser <strong>Tenorshare Reiboot<\/strong> pour une r\u00e9trogradation facile de votre iOS 26 sans aucune perte de donn\u00e9es <\/p>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"622\" src=\"https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot-1024x622.png\" alt=\"\" class=\"wp-image-398580\" srcset=\"https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot-1024x622.png 1024w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot-300x182.png 300w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot-768x466.png 768w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot-330x200.png 330w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot-400x243.png 400w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot-600x364.png 600w, https:\/\/www.macobserver.com\/wp-content\/uploads\/2025\/09\/launch-reiboot.png 1120w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p>Non seulement cette application vous permettra de r\u00e9trograder en toute s\u00e9curit\u00e9, mais vous pouvez \u00e9galement l&rsquo;utiliser pour cr\u00e9er et restaurer une sauvegarde de toutes vos donn\u00e9es, donc vous n&rsquo;avez pas vraiment \u00e0 vous soucier de perdre quoi que ce soit dans le processus.<\/p>\n\n<p>Reiboot est \u00e9galement livr\u00e9 avec de nombreuses autres fonctionnalit\u00e9s que vous pouvez utiliser pour aider \u00e0 la maintenance de votre appareil, c&rsquo;est donc une solution qui se d\u00e9marque vraiment.<\/p>\n\n<p>\u27a1\ufe0f<strong><a  href=\"https:\/\/tenorshare.sjv.io\/9gPaPE?subId1=www.macobserver.com\/fr\/wp-json\/wp\/v2\/posts\/398620&amp;subId2=Native\" rel=\"noreferrer noopener sponsored nofollow\">Essayez Tenorshare Reiboot<\/a><\/strong><\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-method-5-advanced-unsupported-path-to-keep-more-data-at-your-risk\">M\u00e9thode 5 : chemin avanc\u00e9, <strong>non pris en charge<\/strong> pour conserver plus de donn\u00e9es (\u00e0 vos risques)<\/h2>\n\n<p>Certains utilisateurs avanc\u00e9s essaient de \u00ab tromper \u00bb Finder\/iTunes pour qu&rsquo;il accepte une sauvegarde plus r\u00e9cente sur un OS plus ancien en <strong>modifiant les m\u00e9tadonn\u00e9es de sauvegarde<\/strong> (par exemple, changer <code>Product Version<\/code> dans <code>Info.plist<\/code>) puis en restaurant. Cela peut fonctionner ; cela peut aussi corrompre les donn\u00e9es, casser les \u00e9l\u00e9ments Sant\u00e9\/Trousseau, ou faire perdre des heures. <\/p>\n\n<p>Si vous tentez cela, comprenez :<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Ce n&rsquo;est <strong>pas pris en charge<\/strong> par Apple.<\/li>\n\n\n\n<li>Cela peut \u00e9chouer en cours de restauration.<\/li>\n\n\n\n<li>Vous devriez dupliquer le dossier de sauvegarde d&rsquo;abord pour pouvoir revenir en arri\u00e8re.<\/li>\n\n\n\n<li>M\u00eame si cela se restaure, certaines applications\/donn\u00e9es ne se comporteront pas correctement.<\/li>\n<\/ul>\n\n<p>Si vos donn\u00e9es comptent, ne jouez pas, tenez-vous \u00e0 la M\u00e9thode 1 et reconstruisez \u00e0 partir du contenu synchronis\u00e9 plus une sauvegarde plus ancienne.<\/p>\n\n<p>Si vous souhaitez modifier les m\u00e9tadonn\u00e9es de sauvegarde, <a  href=\"https:\/\/www.macobserver.com\/ios\/downgrade-ios-beta\/\">consultez notre article s\u00e9par\u00e9<\/a>.<\/p>\n\n<h2 class=\"wp-block-heading\">Perte de donn\u00e9es, expliqu\u00e9e (ce que vous gardez vs ce que vous perdez)<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>G\u00e9n\u00e9ralement s\u00fbr (si activ\u00e9) :<\/strong> Photos iCloud, Contacts, Calendriers, Notes, Rappels, donn\u00e9es Safari, Messages dans iCloud, Mail, achats App Store.<\/li>\n\n\n\n<li><strong>Souvent \u00e0 risque :<\/strong> donn\u00e9es d&rsquo;applications qui ne se synchronisent pas vers le cloud, vid\u00e9os\/m\u00e9mos vocaux locaux uniquement, historique des appels, passes Wallet non ret\u00e9l\u00e9charg\u00e9es, Sant\u00e9\/Activit\u00e9 si vous n&rsquo;utilisez pas de sauvegardes <strong>chiffr\u00e9es<\/strong>.<\/li>\n\n\n\n<li><strong>Sauvegardes d&rsquo;iOS plus r\u00e9cent<\/strong> \u2192 <strong>iOS plus ancien<\/strong> : g\u00e9n\u00e9ralement <strong>non<\/strong> restaurables.<\/li>\n<\/ul>\n\n<p><strong>Conseil :<\/strong> Avant de r\u00e9trograder, ouvrez chaque application critique et confirmez qu&rsquo;elle se synchronise vers un compte cloud. Exportez tout ce qui ne le fait pas. <\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-troubleshooting\">D\u00e9pannage<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>Erreurs de restauration (-3194, etc.)<\/strong> : mauvais IPSW ou Apple a arr\u00eat\u00e9 de le signer. T\u00e9l\u00e9chargez le bon fichier ou acceptez que vous ne puissiez pas r\u00e9trograder. <\/li>\n\n\n\n<li><strong>Bloqu\u00e9 en r\u00e9cup\u00e9ration<\/strong> : r\u00e9essayez, ou utilisez le <strong>mode DFU<\/strong> (une restauration plus profonde).<\/li>\n\n\n\n<li><strong>Probl\u00e8mes d&rsquo;activation<\/strong> : v\u00e9rifiez le verrouillage Apple ID, le r\u00e9seau et le statut SIM\/eSIM.<\/li>\n\n\n\n<li><strong>Applications manquant de donn\u00e9es apr\u00e8s restauration<\/strong> : connectez-vous, r\u00e9activez la synchronisation et donnez du temps. Certaines applications ret\u00e9l\u00e9chargent les donn\u00e9es lentement. <\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1757582511242\"><strong class=\"schema-faq-question\"><strong>Puis-je r\u00e9trograder d&rsquo;iOS 26 vers iOS 18 sur iPad aussi ?<\/strong><\/strong> <p class=\"schema-faq-answer\">Oui. M\u00eame processus, mais utilisez l&rsquo;IPSW <strong>iPadOS 18<\/strong> pour votre mod\u00e8le d&rsquo;iPad exact. <\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757582516801\"><strong class=\"schema-faq-question\"><strong>Puis-je faire cela sans ordinateur ?<\/strong><\/strong> <p class=\"schema-faq-answer\">Non. Vous avez besoin de Finder\/iTunes pour une vraie r\u00e9trogradation. Sans ordinateur, vous ne pouvez que quitter le canal b\u00eata et attendre les versions publiques.  <\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757582519620\"><strong class=\"schema-faq-question\"><strong>Puis-je restaurer ma sauvegarde iOS 26 sur iOS 18 ?<\/strong><\/strong> <p class=\"schema-faq-answer\">Pas officiellement. Les sauvegardes de versions plus r\u00e9centes ne se restaurent pas sur iOS plus ancien. C&rsquo;est la principale source de perte de donn\u00e9es.  <\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757582527243\"><strong class=\"schema-faq-question\"><strong>La r\u00e9trogradation annulera-t-elle ma garantie ?<\/strong><\/strong> <p class=\"schema-faq-answer\">Non. Mais le Support peut vous demander de mettre \u00e0 jour avant de d\u00e9panner les probl\u00e8mes logiciels. <\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1757582530454\"><strong class=\"schema-faq-question\"><strong>Et si Apple arr\u00eatait de signer iOS 18 ?<\/strong><\/strong> <p class=\"schema-faq-answer\">Vous ne pouvez pas l&rsquo;installer. Votre seule option est la derni\u00e8re version sign\u00e9e pour votre appareil. <\/p> <\/div> <\/div>\n\n<p><br\/><\/p>\n\n<h2 class=\"wp-block-heading\">R\u00e9capitulatif rapide<\/h2>\n\n<ol class=\"wp-block-list\">\n<li>Confirmez qu&rsquo;<strong>iOS 18 est sign\u00e9<\/strong> pour votre mod\u00e8le.<\/li>\n\n\n\n<li><strong>Sauvegardez<\/strong> et <strong>d\u00e9sactivez Localiser<\/strong>.<\/li>\n\n\n\n<li>T\u00e9l\u00e9chargez l&rsquo;<strong>IPSW correct<\/strong>.<\/li>\n\n\n\n<li>Entrez en <strong>mode r\u00e9cup\u00e9ration<\/strong> \u2192 <strong>Restaurez<\/strong> avec IPSW dans Finder\/iTunes.<\/li>\n\n\n\n<li>Configurez comme <strong>nouveau<\/strong> ou restaurez une sauvegarde <strong>plus ancienne, compatible<\/strong>.<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusion<\/h2>\n\n<p>R\u00e9trograder d&rsquo;iOS 26 vers iOS 18 est possible si Apple signe encore l&rsquo;ancien firmware. Cela n\u00e9cessite de la pr\u00e9paration et une restauration compl\u00e8te, mais une fois termin\u00e9, vous serez de retour sur un terrain stable avec moins de bogues et un meilleur support d&rsquo;applications. Rappelez-vous simplement : ce n&rsquo;est pas un basculement temporaire. Vous effacerez votre appareil, donc sauvegardez d&rsquo;abord et suivez les \u00e9tapes attentivement.   <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tout le monde n&rsquo;aime pas vivre \u00e0 la pointe de la technologie logicielle. Peut-\u00eatre qu&rsquo;iOS 26 a cass\u00e9 une application sur laquelle vous comptez, ou que l&rsquo;autonomie de la batterie ne tient pas le coup. La bonne nouvelle est que vous pouvez revenir \u00e0 iOS 18, si Apple le signe encore. Puis-je r\u00e9trograder d&rsquo;iOS 26 [&hellip;]<\/p>\n","protected":false},"author":18939,"featured_media":398435,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[82137,82101],"tags":[82211],"work":[],"class_list":["post-398620","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide-pratique","category-non-categorise","tag-epoustouflant"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Comment r\u00e9trograder d&#039;iOS 26 vers iOS 18 en toute s\u00e9curit\u00e9 : 5 m\u00e9thodes<\/title>\n<meta name=\"description\" content=\"Vous envisagez de quitter iOS 26 ? Apprenez comment r\u00e9trograder votre iPhone ou iPad en toute s\u00e9curit\u00e9 vers une version stable comme iOS 18.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment r\u00e9trograder d&#039;iOS 26 vers iOS 18 en toute s\u00e9curit\u00e9 : 5 m\u00e9thodes\" \/>\n<meta property=\"og:description\" content=\"Vous envisagez de quitter iOS 26 ? 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Her curiosity about technology only grew from there, leading her to delve deep into both macOS and Windows systems. After beginning her content writing journey in 2021 with Windows Report, Amalia transitioned to The Mac Observer in 2023. Alongside producing articles, she plays a pivotal role in mentoring new writers, ensuring that the content resonates well with our readers. Her hands-on experience has already established her as a reliable figure in our community. 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Her curiosity about technology only grew from there, leading her to delve deep into both macOS and Windows systems. After beginning her content writing journey in 2021 with Windows Report, Amalia transitioned to The Mac Observer in 2023. Alongside producing articles, she plays a pivotal role in mentoring new writers, ensuring that the content resonates well with our readers. Her hands-on experience has already established her as a reliable figure in our community. At the moment, she relies on her 13-inch, M1, 2020 MacBook Pro and 7th generation iPad from 2019 to produce top content.","sameAs":["https:\/\/x.com\/amalaia123"],"honorificPrefix":"Mrs","birthDate":"2000-06-11","gender":"female","knowsAbout":["Apple","Windows","iPhone","Mac","troubleshooting"],"knowsLanguage":["English"],"jobTitle":"Writer","url":"https:\/\/www.macobserver.com\/fr\/author\/amalia_a\/"},{"@type":"Question","@id":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/#faq-question-1757582511242","position":1,"url":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/#faq-question-1757582511242","name":"Puis-je r\u00e9trograder d'iOS 26 vers iOS 18 sur iPad aussi ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Oui. M\u00eame processus, mais utilisez l'IPSW <strong>iPadOS 18<\/strong> pour votre mod\u00e8le d'iPad exact. 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","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/#faq-question-1757582519620","position":3,"url":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/#faq-question-1757582519620","name":"Puis-je restaurer ma sauvegarde iOS 26 sur iOS 18 ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Pas officiellement. Les sauvegardes de versions plus r\u00e9centes ne se restaurent pas sur iOS plus ancien. C'est la principale source de perte de donn\u00e9es.  ","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/#faq-question-1757582527243","position":4,"url":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-retrograder-dios-26-vers-ios-18-en-toute-securite-5-methodes\/#faq-question-1757582527243","name":"La r\u00e9trogradation annulera-t-elle ma garantie ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Non. Mais le Support peut vous demander de mettre \u00e0 jour avant de d\u00e9panner les probl\u00e8mes logiciels. 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