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Hi, I have 2015 MacBook Pro with an upgraded SSD, a Samsung 970 Pro M.2 SSD.
I update Mac OS to 11.1 and want to made clean install. Tried to boot in recovery mode, but Disk Utility doesn’t recognize the SSD.
In terminal with command “diskutil list” I see only SD card and recovery 2GB disk and bunch of small partitions about 500kb.
When I boot the system I can see the SSD and system working fine.
Ist dies eine gute Frage?
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Some SSD adapter cards aren't compatible with older versions of macOS, therefore they do not show up. I know for OWC drives the minimum version they work in is macOS High Sierra, it should probably be the same for the M.2 to mini PCIe adapter you're using.
War diese Antwort hilfreich?
Very true! That would be High Sierra (10.13.x) which offered the required driver for 3rd party SSD's like OWC. Here we are using a much newer macOS release! High Sur (11.1.x)
Yes, however I had issues connecting to the Big Sur recovery CDN last week (I called Apple and the problem somehow got resolved however). The thing is that in macs who do not have an OS installed it is not possible for the system to know what is the last version of macos installed, therefore Cmd+R falls back to the original version of macOS that came with the mac. In the case of this one (I have the same model myself) it's El Capitan, which does not have support for those SSDs. To force boot to Big Sur network recovery Cmd+Opt+R should be used instead. In any case, the r/Apple community says that Cmd+R is useless which is rather true and for installing Cmd+Opt+R should be used instead.
@commandblock - I don't use the internet recovery ;-}
I setup USB thumb drives as bootable OS installers, even Big Sur!
Much quicker and I don't need to worry about Apples servers messing up.
@danj After the fail I had last week I'm doing that too. Much better
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5 Kommentare
Which model do you have a 13" or a 15"
von Dan
@danj 13” MacBook Pro
von Иван Ниров
I'm still a bit lost here. Can you take a snapshot of Disk utility expanding the different layers in the left column posting the pics here Bilder zu einer vorhandenen Frage hinzufügen. If you can see the boot partitions then you didn't wipe the drive fully.
Also are you using a Big Sur boot drive (2TB external)? Or the OS recovery services off the internet?
von Dan
Did you solve the problem? I have same problem. When I start up the Mac and us it, it works perfectly fine, but I want to erase and start clean OS and I can't do it because disk utility in recovery mode does not show the ssd so I can not delete it.
von Editor
@Editor - Yes, that can happen!
You're hitting a known issue because your recovery OS release only works with HFS+ file systems and has no clue about APFS file systems so it can't see it! This gets back to not using recovery!
Instead create a bootable OS installer based on Mojave or newer! Then that version of Disk Utility will see the APFS partitions and you can delete them or reformat it.
FYI - I only use bootable OS installers for each release I've got over a good half dozen which I use and just as many which are tucked away with older versions.
von Dan