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MPB doesn't recognize Sandisk SSD anymore. I thought I formatted it for this Mac and for PC. I've used files from this SSD on my MBP before. I did plug the SSD into a PC recently and it read fine. Now my MBP doesn't recognize it anymore. What happened, and how can I fix this?
MacBook Pro (2021)
We occasionally see drives fail when they were not ERASEd when new, but the maker's Utilities, including Paragon or Tuxiera NTFS Drivers were installed. All proceeds fine until that Driver is not included in the MacOS image being used, then the drive 'mysteriously' stops working.
A drive set up by the maker as Windows New Technology File System (NTFS) can have MacOS Volumes created on it, either MacOS extended or APFS, when those Utilities are present. But when the Utilities are not there (a different Mac, a different MacOS, or something else) the drive won't mount. But It will show up in Disk Utility.
We occasionally see drives fail when they were not ERASEd when new, but the maker's Utilities, including Paragon or Tuxiera NTFS Drivers were installed. All proceeds fine until that Driver is not included in the MacOS image being used, then the drive 'mysteriously' stops working.
A drive set up by the maker as Windows New Technology File System (NTFS) can have MacOS Volumes created on it, either MacOS extended or APFS, when those Utilities are present. But when the Utilities are not there (a different Mac, a different MacOS, or something else) the drive won't mount. But It will show up in Disk Utility.
Open Terminal and type this command, which just lists all the drives and partitions on your Mac, including 'helper' partitions. It changes NOTHING:
diskutil list
copy the text or screenshot and post a picture.
<< I did plug the SSD into a PC recently and it read fine. Now my MBP doesn't recognize it anymore. >>
Look at the last line of the report:
It looks like the PC changed the partition TYPE, which is now "Microsoft Basic Data" partition.
MacOS has no clue how to Mount a drive of that partition-type.
It can create and read and write and format exFAT drives, a common PC format.
Ugh.
Looks like I will have to use that SSD for work stuff- which is done on PC.
Thanks so much for your help. It helps me to understand what NOT to do! (That means stay away from PCs, I guess. never the twain shall meet.....haha!!)
Off-topic, but what is a good-affordable- 1 or 2TB SSD for my MBP? I'll need to transfer all my docs from my 2015 MBP- AGAIN.
FYI for whoever comes upon this in the future. I have the Sandisk 4TB Extreme SSD drive, bought at B&H Photo in June 2024. This is what I did to resolve.. I restarted my MBP, running Intel, and had to wait for a bit but the drive finally showed up again. I was able to confirm that it was there running `diskutil list` in Terminal window as someone had suggested (thanks to them). I may have formatted the drive the first time I plugged it into my MBP. I never plugged it into a Windows PC.
the diskutil list posted above shows the stark difference between a drive set up for APFS with MacOS installed (the first several entries) including a multi-layer container setup and a virtual drive inside the container.
Contrast to the second drive which may have been modified by a PC and has ONLY a Micrsoft Basic Volume, not directly Mountable on a Mac.
Here is a screenshot of the Disk Utility.
Thanks!
I see it in Disk utility.
How do I open the drive and use it?
While you have it there, you might want to select the drive and Repair/First Aid
Select the drive and click the Mount icon.
if you get an error message, what error?
Clicked First Aid. Then "done'.
The mount icon is greyed out.
what kind of Drive does Disk Utility think it is? can you post a screenshot?
Lihat Sandi saya
MPB doesn't recognize Sandisk SSD anymore
