Released October 24, 2011 / 2.2, 2.4, or 2.5 GHz Quad-core Intel Core i7 Processor

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Unable to format ssd on mac os

Just buy a new ssd sandisk sata III X100 and I can't format it on mac os expanded! Maybe i buy the wrong SSD ? Should i format it in MS-DOS (FAT) or Ex FAT?

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What are you using to format it? Disk Utility shouldn't have an issue with that model SSD.


ncapone87 - For future reference you posted a Question in the place where only Answers belong. Please use the add comment link to the appropriate Answer, Question or create your original Question.


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Neither. It must formatted in GUID to work with Mac OS X.

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I use MS-DOS on a Macbook to format all external mini disks and they work just fine and also work transferring data to Windows.


One other possibility - some new disks come in NTFS: This is a more recent Windows' default file system than DOS. Windows can read and write to NTFS-formatted drives. OS X and Linux can only read NTFS-formatted drives, not write to them (format)—unless you have a third-party driver like NTFS-3G installed.

To claifiy my answer if you are going to use a Disk as a BOOT SOURCE FOR MAC it must be formatted in GUID.


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I have the same problem cannot create partition or erase

The new 1 to ssd hd With disk utility :(

I purchase from u guys... My Mac see it

But cannot do nothing very sad.. Will have

To re-Install my cd drive since this second

Internal seems to not works at all .. Please

Help thank you Before i open again my MacBook

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productionssoleil - For future reference you posted a Comment in the place where only Answers belong. Please use the add comment link to the appropriate Answer, or Question. Try formatting the disk in an external case... before putting it in the optibay.


Did it and works Well as external With external bay can format

Clear reinstall my partition under Any format Mac/fat32 anything

But inside i got all kind of problem Like he doesnt

Allow to write error-50 or cannot format or doesnt

See drive at all im good in computer and know

How to remove partition erase drive completely

Using either terminal With command diskutil or

Disk utility in Spotlight

So what i think IS that thé Sshd 1 to. IS not

Support internally by my mbp 15" late 2011 the internal connection

For cd drive IS NOT appropriate to handle another Sshd maybe regular hd

But not ssd or sshd

So i purchase this for nothing except using

Super duper to have a backup external

Drive USB bootable if my internal 750g

Crashes.... VERY DISAPOINTED of my purchase


It could be the optibay - not the SSD. OR the cable for the Optibay. What exactly did you purchase from iFixit... and have you contacted iFixit customer service about it using the link at the bottom of this page? WE ARE NOT IFIXIT CUSTOMER SERVICE This is the volunteer self-help forum. We are not iFixit employees... just DIYer (maybe with more experience) like you.


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Gilbert will be eternally grateful.
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