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Question: Mac cannot format/partition an SD

I'm trying to use a brand new 256 GB sd card.

When I first inserted it in my MBP it says there were errors that couldn't be repaired.

I though I'd format it, also because it was in exFAT and I wanted it Journaled.

Then: the havoc.


Nothing seemed to work.

Disk Utility can't ERASE it, neither in Journaled nor in exFAT. Error seems to be it "couldn't modify partition map"

Disk Utility doesn't give me the option to PARTITION it, either. The button is greyed.

I have tried it on a Windows 10 machine and I could Format it in exFAT but when inserted back in my MBP - where I need it to be - everything just started all over again.


Any hint?

MacBook Pro (Retina, Mid 2012), iOS 11.3

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Answer:

Solved!!!!


I have used the hint here to erase it in MS-DOS format, then used Disk Utility to erase it and name it again in Journaled format.


I suspect the first passage could have been done via Disk Utility, as well. I can't verify that now, though, because the card now works.

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Question marked as Solved

May 29, 2018 12:42 AM in response to eeWee In response to eeWee

Solved!!!!


I have used the hint here to erase it in MS-DOS format, then used Disk Utility to erase it and name it again in Journaled format.


I suspect the first passage could have been done via Disk Utility, as well. I can't verify that now, though, because the card now works.

May 29, 2018 12:42 AM

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Question: Mac cannot format/partition an SD