Now that you have learned about the causes, you can try the solutions below to fix "the disk you attached was not readable by this computer". Here is the list of the common reasons.įix The Disk You Inserted Was Not Readable by This Computer You receive the error - the disk you attached was not readable by this computer on Mac when you connect an external hard drive, USB drive, or SD card to your Mac. Is there any way to fix the flash drive and get access to my data?" Whenever I plugged it into my MacBook, I get the error message 'the disk you inserted was not readable by this computer.' I have many family pictures and working documents saved on the USB. "My Sandisk USB flash drive becomes unreadable and inaccessible for unknown reasons. The Disk You Inserted Was Not Readable by This Computer on Mac Open Disk Utility > Choose the problematic disk and click "First Aid" > "Repair disk" > "Erase". Full stepsĬonnect the external device to Mac > Go to "Utilities" > Select the device and click "First Aid". Full stepsĬheck if the file system of your external device is NTFS. It makes a lot more sense that way.Connect another external USB to your Mac, and check if it appears in Finder. I’m hoping they add a startup key - like holding the mouse button on startup to eject a stuck CD - for booting from the SD. Change the default partition table to GUID using Disk Utility, and format the card to use the Mac OS Extended file format to do so. You never have a chance to preempt problems because OS X is so good at hiding them.Ĭan I install Mac OS X on an SD storage device and use it as a startup volume?
In my experience, Macs generally only fail suddenly and cataclysmically, as in the case of my brother’s MacBook, which shut down in the middle of playing a song, and never woke back up again.
Why would you want to do this ridiculous thing? The idea is you could boot from it to address emergent hard drive failure, data corruption, or viral attack. It seems that the SD card slot in the new MacBook Pros does count as a bootable device all you have to do is install OS X onto a card, set it as the default boot device, and you’re good to go.
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