![]() All it says is something like “System was unable to restore back up. The HD in my mid-2012 MacBook Pro won’t boot and instead of restoring onto the same HD thereby risking losing all the data, I installed a new HD and am attempting to restore from a TM back up on a 2 to Seagate external drive. I wasted a lot of time and energy trying this. Now I have a working laptop but have the same issues of no captive portal access (Starbucks and airports are captive portal access locations) and external drives being “in use” when I try to eject. That required erasing the HD, reinstalling 10.14, upgrading to 10.15, and restoring using Migration Assistant. In my case (MacBook Pro mid-2012 15″ Retina with SSD) I was left with a HD that could be seen and analyzed by OS utilities but could not be seen at bootup.Īfter 2 days of warting with every trick I knew from years teaching CS, I just went back to 10.15. Starting the recovery from 10.15 will write the data back to the HD, after the usual several hours if your drive is large, but does not always rewrite the recovery partition. The Mac Genius where I went for help told me the file and drive have some codes that are serial number and OS version specific and that 10.15 changes data so 10.14 can’t see the Time Machine after 10.15 touches it. If you use the Time Machine recovery method and you have run a backup while on 10.15, even if you have ones still there that ran on 10.14, the Recovery may not leave you with a bootable HD and Time Machine will not see the drive or files from 10.14. Having frequent backups is basically essential, so if you haven’t done so yet, do yourself a favor and get Time Machine configured with your Mac, hopefully you’ll never need to use the backup service, but if you do, you’ll be happy you set it up.īe careful trying to return to 10.14 if 10.15 does not work for you. Of course it may go without saying that this requires a recent Time Machine backup to even restore the Mac from in the first place, which is why setting up Time Machine, letting it perform it’s backup routine on schedule, and ideally starting and completing manual backups before installing system updates or modifying major Mac OS X components is so strongly recommended.ĭo note that with modern MacOS versions you can also re-install Mac OS X without a Time Machine backup, but you can potentially lose data and personal files that way. Pretty easy, right? You’ll be back on your feet in no time with this method of restoring a hard drive from Time Machine backups. When Time Machine has finished restoring everything, the Mac will reboot into the restored state from the chosen backup date.Select the date and time of the Time Machine backup you wish to restore the entire Mac from, and click on “Continue” – this begins the restoration process from the backup you selected, generally you’ll want to pick the most recently made backup but advanced users may choose another date (keep in mind if you pick an earlier date you will lose files and data created from that date onward).Select the Time Machine volume (either the external back up drive, network Time Capsule, or otherwise).At the “Mac OS X Utilities” screen, choose “Restore from Time Machine Backup” and click on the Continue button.Start up or reboot the Mac and hold down the Command+R keys simultaneously, this will boot into the Mac OS Recovery Partition. ![]()
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