{"id":394530,"date":"2025-09-17T05:17:08","date_gmt":"2025-09-17T09:17:08","guid":{"rendered":"https:\/\/www.macobserver.com\/non-categorise\/comment-revenir-de-macos-26-tahoe-a-macos-sequoia\/"},"modified":"2025-09-18T02:49:34","modified_gmt":"2025-09-18T06:49:34","slug":"comment-revenir-de-macos-26-tahoe-a-macos-sequoia","status":"publish","type":"post","link":"https:\/\/www.macobserver.com\/fr\/guide-pratique\/comment-revenir-de-macos-26-tahoe-a-macos-sequoia\/","title":{"rendered":"Comment r\u00e9trograder de macOS Tahoe vers macOS Sequoia"},"content":{"rendered":"\n

Vous pourriez vous pr\u00e9cipiter pour installer la version b\u00eata pour d\u00e9veloppeurs de macOS 26 Tahoe pour ses nouvelles fonctionnalit\u00e9s, pour le regretter peu apr\u00e8s. Les versions b\u00eata comportent souvent des bugs, des probl\u00e8mes de performance et des fonctionnalit\u00e9s manquantes. Si vous devez revenir \u00e0 macOS Sequoia, vous devrez d\u00e9sactiver les mises \u00e0 jour b\u00eata et cr\u00e9er une sauvegarde compl\u00e8te. Ensuite, vous pourrez r\u00e9installer macOS Sequoia en utilisant soit Time Machine, soit la r\u00e9cup\u00e9ration macOS. Voici comment fonctionnent ces deux m\u00e9thodes. <\/p>\n\n

Choses \u00e0 faire avant de d\u00e9sinstaller la version b\u00eata de macOS 26 Tahoe<\/h2>\n\n

D\u00e9sactiver les mises \u00e0 jour b\u00eata<\/h3>\n\n

La premi\u00e8re chose \u00e0 faire est de d\u00e9sactiver les mises \u00e0 jour b\u00eata sur votre Mac. Cela annulera votre inscription au Programme pour d\u00e9veloppeurs Apple, de sorte que votre Mac ne recevra que des mises \u00e0 jour stables \u00e0 l’avenir. Voici comment supprimer le profil b\u00eata de votre Mac : <\/p>\n\n

    \n
  1. Ouvrez l’application R\u00e9glages Syst\u00e8me<\/strong> sur votre Mac.<\/li>\n\n\n\n
  2. Dans la barre lat\u00e9rale gauche, choisissez G\u00e9n\u00e9ral > Mise \u00e0 jour de logiciels.<\/strong>\"Section<\/li>\n\n\n\n
  3. Cliquez sur la petite ic\u00f4ne d’information i <\/strong>\u00e0 c\u00f4t\u00e9 de l’option Mises \u00e0 jour b\u00eata<\/strong>.\"Section<\/li>\n\n\n\n
  4. Dans la liste des options, s\u00e9lectionnez D\u00e9sactiv\u00e9.<\/strong>\"Désactiver<\/li>\n\n\n\n
  5. Cliquez sur Termin\u00e9<\/strong> pour enregistrer les modifications.<\/li>\n<\/ol>\n\n

    Cr\u00e9er une sauvegarde compl\u00e8te<\/h3>\n\n

    Une autre chose \u00e0 faire est de sauvegarder votre Mac<\/a> avant de revenir \u00e0 la version stable de macOS Sequoia. C’est parce que la d\u00e9sinstallation de la version b\u00eata de macOS 26 effacera l’int\u00e9gralit\u00e9 du disque de d\u00e9marrage<\/strong>. Pour \u00e9viter de perdre vos donn\u00e9es, la meilleure fa\u00e7on de sauvegarder votre MacBook est d’utiliser Time Machine, le logiciel de sauvegarde int\u00e9gr\u00e9 d’Apple. Cela vous permet de cr\u00e9er une sauvegarde compl\u00e8te de vos donn\u00e9es, et vous pouvez facilement restaurer votre Mac \u00e0 la date pr\u00e9c\u00e9dente sans aucun probl\u00e8me. Voici comment proc\u00e9der : <\/p>\n\n

      \n
    1. Connectez un SSD ou HDD externe dont la capacit\u00e9 de stockage est deux fois sup\u00e9rieure \u00e0 celle de votre MacBook. V\u00e9rifiez \u00e9galement que le disque ne contient pas d’autres fichiers. <\/li>\n\n\n\n
    2. Ouvrez r\u00e9glages syst\u00e8me > G\u00e9n\u00e9ral > Time machine.<\/strong>\"Option<\/li>\n\n\n\n
    3. Ici, cliquez sur l’option Ajouter un disque de sauvegarde<\/strong> ou sur le bouton Ajouter (+).<\/strong>\"Ajouter<\/li>\n\n\n\n
    4. Ensuite, s\u00e9lectionnez le disque externe<\/strong> que vous avez connect\u00e9.<\/li>\n\n\n\n
    5. S\u00e9lectionnez l’option Configurer le disque<\/strong> et suivez les instructions \u00e0 l’\u00e9cran.<\/li>\n\n\n\n
    6. Une fois la configuration termin\u00e9e, votre Mac commencera automatiquement \u00e0 utiliser le disque connect\u00e9 pour effectuer les sauvegardes. Pour cr\u00e9er une sauvegarde manuelle, appuyez sur le bouton Sauvegarder maintenant<\/strong>. <\/li>\n\n\n\n
    7. Une fois le processus termin\u00e9, vous pouvez \u00e9jecter votre disque.<\/li>\n<\/ol>\n\n

      Pour plus de d\u00e9tails, vous pouvez consulter cette page d’assistance Apple.<\/a> <\/p>\n\n

      Comment revenir de la version b\u00eata de macOS 26 Tahoe \u00e0 macOS 15 Sequoia sans perdre de donn\u00e9es<\/h2>\n\n

      Vous \u00eates maintenant pr\u00eat \u00e0 installer la version stable pr\u00e9c\u00e9dente de macOS. Vous pouvez le faire en utilisant Time Machine ou le mode de r\u00e9cup\u00e9ration. Nous avons expliqu\u00e9 les deux m\u00e9thodes ci-dessous. <\/p>\n\n

      M\u00e9thode 1 : utilisation de Time Machine<\/h2>\n\n

      1. Effacer votre Mac<\/h3>\n\n

      Temps n\u00e9cessaire\u00a0: <\/span>5 minutes<\/p>

      Notez que vous ne pouvez pas installer macOS Sequoia par-dessus macOS Tahoe. Si vous souhaitez faire passer votre Mac de macOS Tahoe \u00e0 macOS Sequoia, vous devrez effacer compl\u00e8tement votre Mac. Tout comme pour l’iPhone et l’iPad, Apple propose un moyen rapide de r\u00e9initialiser votre Mac aux param\u00e8tres d’usine. <\/p>

      1. Ouvrez r\u00e9glages > G\u00e9n\u00e9ral<\/strong> ><\/strong> transf\u00e9rer ou r\u00e9initialiser<\/strong>.<\/em><\/strong>

        \"Transf\u00e9rer<\/p> <\/li>

      2. Ici, cliquez sur Effacer tout le contenu et les r\u00e9glages<\/em>. <\/strong> <\/strong>

        \"Effacer<\/p> <\/li>

      3. Suivez les instructions \u00e0 l’\u00e9cran.<\/em><\/strong>

        <\/p> <\/li><\/ol><\/div>\n\t\t

        \n\t\t\t
        \n\t\t\t\t\"Note\n\t\t\t\tNOTE<\/span>\n\t\t\t<\/div>\n\t\t\t
        \n\t\t\tFor more details, here’s our step-by-step guide on how to wipe off a MacBook.<\/a>\t\t\t<\/div>\n\t\t<\/section>\n\t\t\n

        Une fois la r\u00e9initialisation d’usine termin\u00e9e, votre Mac devrait red\u00e9marrer avec la derni\u00e8re version stable de macOS. Lorsque vous voyez un \u00e9cran Activer Mac<\/strong>, cliquez sur Red\u00e9marrer<\/strong> et il vous guidera \u00e0 travers le processus de configuration. <\/p>\n\n

        2. R\u00e9cup\u00e9rer votre Mac \u00e0 l’aide de Time Machine<\/h3>\n\n

        Apr\u00e8s avoir supprim\u00e9 tout le contenu et les r\u00e9glages, vous pouvez le configurer comme nouveau ou le restaurer \u00e0 partir d’une sauvegarde pr\u00e9c\u00e9dente. Si vous avez sauvegard\u00e9 votre Mac avec Time Machine avant de passer \u00e0 macOS 26 Tahoe, <\/strong>la r\u00e9cup\u00e9ration des donn\u00e9es serait assez simple. Si vous avez effectu\u00e9 une sauvegarde apr\u00e8s, cependant, vous r\u00e9installerez simplement la version b\u00eata. <\/p>\n\n

        Vous pouvez r\u00e9cup\u00e9rer vos donn\u00e9es pendant le processus de configuration ou m\u00eame apr\u00e8s. Voici comment r\u00e9cup\u00e9rer les donn\u00e9es de votre Mac via Time Machine : <\/p>\n\n

          \n
        1. Lors de la configuration de votre machine<\/strong>, on vous demandera si vous avez une sauvegarde Time Machine. S\u00e9lectionnez oui. <\/strong> <\/li>\n\n\n\n
        2. Branchez votre disque de sauvegarde et permettez \u00e0 votre Mac de r\u00e9cup\u00e9rer les donn\u00e9es \u00e0 partir de la sauvegarde Time Machine.<\/strong><\/li>\n<\/ol>\n\n

          Si vous souhaitez r\u00e9cup\u00e9rer votre sauvegarde Time Machine ult\u00e9rieurement, vous pouvez le faire en utilisant la r\u00e9cup\u00e9ration macOS. <\/p>\n\n

            \n
          1. Connectez votre disque dur<\/strong> qui contient votre sauvegarde Time Machine. <\/li>\n\n\n\n
          2. Red\u00e9marrez votre Mac<\/strong>. <\/li>\n\n\n\n
          3. Sur les Mac Apple Silicon, maintenez la touche d’alimentation<\/strong> enfonc\u00e9e jusqu’\u00e0 ce que vous voyiez Chargement des options.<\/strong> Puis s\u00e9lectionnez Options > Continuer.<\/strong> Sur l’\u00e9cran qui appara\u00eet, choisissez Options<\/strong> et cliquez sur le bouton Continuer<\/strong>.\"Mode<\/li>\n\n\n\n
          4. Si vous avez un Mac Intel, appuyez sur Command + R jusqu’\u00e0 ce que le logo Apple apparaisse.<\/li>\n\n\n\n
          5. Une fois dans la r\u00e9cup\u00e9ration macOS, vous verrez une option pour Restaurer \u00e0 partir de votre sauvegarde Time Machine<\/strong>. S\u00e9lectionnez-la et cliquez sur Continuer.<\/strong> \"Restaurer<\/li>\n\n\n\n
          6. Ensuite, choisissez votre source de sauvegarde<\/strong> et appuyez \u00e0 nouveau sur le bouton Continuer<\/strong>.<\/li>\n<\/ol>\n\n

            M\u00e9thode 2 : utilisation de la r\u00e9cup\u00e9ration macOS<\/h2>\n\n

            Pour une meilleure compr\u00e9hension, nous avons divis\u00e9 le processus en trois \u00e9tapes principales.<\/p>\n\n

            1. Entrer en mode de r\u00e9cup\u00e9ration<\/h3>\n\n
              \n
            1. Tout d’abord, \u00e9teignez votre Mac.<\/strong><\/li>\n\n\n\n
            2. Red\u00e9marrez votre MacBook en appuyant sur la touche d’alimentation<\/strong>. Maintenez la touche enfonc\u00e9e jusqu’\u00e0 ce que vous voyiez le volume syst\u00e8me et Options.<\/strong> <\/li>\n\n\n\n
            3. Si vous avez un Mac Intel, appuyez sur la touche d’alimentation, puis appuyez sur Command + R jusqu’\u00e0 ce que le logo Apple apparaisse.<\/li>\n\n\n\n
            4. Sur l’\u00e9cran qui appara\u00eet, choisissez Options<\/strong> et cliquez sur le bouton Continuer<\/strong>.\"Mode<\/li>\n\n\n\n
            5. Saisissez votre mot de passe de compte Apple.<\/strong><\/li>\n\n\n\n
            6. NE CHOISISSEZ PAS <\/strong>l’option de r\u00e9installation de macOS ici.<\/li>\n<\/ol>\n\n

              2. Effacer le disque avec le logiciel b\u00eata<\/h3>\n\n
                \n
              1. Lorsque vous voyez Utilitaire de disque, <\/strong>s\u00e9lectionnez-le puis cliquez sur Continuer.<\/strong><\/li>\n\n\n\n
              2. Choisissez le disque de d\u00e9marrage et cliquez sur Effacer<\/strong> dans la barre d’outils.<\/li>\n\n\n\n
              3. Maintenant, saisissez le nom de votre disque, choisissez un syst\u00e8me de fichiers et appuyez sur le bouton Effacer<\/strong>.<\/li>\n\n\n\n
              4. Cliquez \u00e0 nouveau sur Effacer <\/strong>pour confirmer votre d\u00e9cision.<\/li>\n\n\n\n
              5. Dans la barre de menu, cliquez sur Utilitaire de disque > Quitter l’utilitaire de disque<\/strong>.<\/li>\n<\/ol>\n\n

                3. R\u00e9installer macOS Sequoia<\/h3>\n\n
                  \n
                1. Maintenant, vous \u00eates pr\u00eat \u00e0 installer macOS Sequoia.<\/li>\n\n\n\n
                2. Lorsque vous y \u00eates invit\u00e9, connectez-vous \u00e0 un r\u00e9seau Wi-Fi<\/strong> disponible.<\/li>\n\n\n\n
                3. Votre Mac s’activera maintenant et vous pourrez cliquer sur l’option Quitter vers la r\u00e9cup\u00e9ration<\/strong>.<\/li>\n\n\n\n
                4. Enfin, choisissez R\u00e9installer macOS Sequoia<\/strong> dans la liste des options disponibles. \"Réinstaller<\/li>\n<\/ol>\n\n

                  Votre Mac va maintenant t\u00e9l\u00e9charger et installer macOS Sequoia. Ce processus peut prendre de quelques minutes \u00e0 quelques heures, selon votre vitesse Internet. Si vous souhaitez revenir de la version b\u00eata d’iOS 26 \u00e0 iOS 18<\/a>, voici comment le faire sans perdre de donn\u00e9es.<\/strong> <\/p>\n\n

                  <\/p>\n","protected":false},"excerpt":{"rendered":"

                  Vous pourriez vous pr\u00e9cipiter pour installer la version b\u00eata pour d\u00e9veloppeurs de macOS 26 Tahoe pour ses nouvelles fonctionnalit\u00e9s, pour le regretter peu apr\u00e8s. Les versions b\u00eata comportent souvent des bugs, des probl\u00e8mes de performance et des fonctionnalit\u00e9s manquantes. Si vous devez revenir \u00e0 macOS Sequoia, vous devrez d\u00e9sactiver les mises \u00e0 jour b\u00eata et […]<\/p>\n","protected":false},"author":19675,"featured_media":389297,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[82137,82101],"tags":[],"work":[],"class_list":["post-394530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide-pratique","category-non-categorise"],"acf":[],"yoast_head":"\nComment r\u00e9trograder de macOS Tahoe vers macOS Sequoia<\/title>\n<meta name=\"description\" content=\"Pour revenir de macOS 26 Tahoe \u00e0 macOS Sequoia, d\u00e9sactivez les mises \u00e0 jour b\u00eata, sauvegardez vos donn\u00e9es, r\u00e9installez macOS. 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