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EFI written over by bootcamp  

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Hello, I'm almost at a loss here and really confused. If I have to erase the hard drive, well then I'll suck it up, but not before I ask for help.

I was in the process of installing Windows on my Mac pro5,1 and I knowingly let Windows 10 mess up my partition efi info.

It's there any way I can restore my mac efi info and erase the ms-dos entries?

If I have to erase the hard drive, well then I'll suck it up, but not before I ask for help.

Thank you in advance,

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Try reinstalling MacOS via internet recovery. Startup with command-R and follow the onscreen instructions to invoke a reinstall of MacOS. That might do it.

You may also want to read up on the matter since you are facing this issue. Perhaps there are clues here that can help beyond my one step. https://eclecticlight.co/2018/08/01/disks-partitions-volumes-containers/

 

I will find some more links for you:

https://www.macobserver.com/tips/quick-tip/macos-removing-windows-efi-boot-entry/ - not sure if related to your situation

http://osxdaily.com/2016/07/28/fix-broken-efi-partition-mac/ - old

EFI should come back with a MacOS reinstall.

As for erasing the MSDOS entries, I would think you could use disk utility to reformat those as HFS extended GUID or APFS depending on drive and then merge the partitions - back up before doing this though. Although, it might be the case that a partition made with Boot Camp Assistant can only be removed by the Boot Camp Assistant.

You might want to try the boot camp forum over at Apple, your issue is fairly specific and with the info you offered and my knowledge set being subpar on the topic you may want to consult there: https://discussions.apple.com/search?q=boot+camp

 

Hop all this verbiage helps.

 

This post was modified 3 weeks ago by Alex Santos
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