I do continue, and the restore completes, the computer can boot and run without problems again from the SSD. Then, when I use Carbon Copy Cloner to try to restore the startup SSD from the backup, it displays an error along the lines of “The OS is reporting read/write problems with this drive. Would you like to format it?” warning appears related to the SSD, requiring me to completely reformat it. When I then boot from the backup drive (an internal 1TB hard disk), a “This disk is unrecognized.
It’s not the original SSD delivered with the iMac, but rather a replacement unit installed by technicians at the Apple Store when the original SSD died last year:Īfter running the installer, when the computer reboots, the progress bar proceeds about 75% across, and then the circle-with-a-line-through-it icon appears on the screen, indicating that no bootable system exists on the startup drive.
Backup os x yosemite mac os x#
Original post → I’ve been unable to install the Mac OS X 10.10 Yosemite GM 1 on my mid-2011 27″ iMac, and wanted to document the problem here in case others are running into the same issue. So again, exactly the same experience when trying to install on the backup drive as I had when installing on the primary SSD. When trying to restore the backup drive from the SSD, I got the same “volume is unreadable” error (requiring reinitialization) and then when trying to restore the backup drive, I got the same “OS X reports read/write errors on the drive” from Carbon Copy Cloner. The exact same thing happened - Upon reboot, the startup progress bar proceeded about half-way across, and then I got the “no-system” icon. Instead of installing Yosemite on the SSD, I tried installing it on the backup drive, an internal 1TB Hitachi drive.
Backup os x yosemite update#
Update → I’ve now determined that the problem is not with the SSD, but something related to the machine itself.
Hopefully this doesn’t affect too many others. I tried installing that version on our iMac, and it again failed, wiping out the startup drive. Update → Although I sent a RADAR bug report, Apple weren’t able to fix this before releasing the final version of Yosemite. Apple are aware, but so far haven’t been able to help. I’ve been unable to install Yosemite on a mid-2011 iMac.
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