Hi HWTech, Thanks for your reply. My MBP is a 13", the cable was previously replaced after failure a few years ago. I do not see the SSD when booting from option internally, but I do see it when entering into Internet Recovery Mode when it is internal. I ran First Aid on the volume, re-installed OS X, and still saw the flashing folder. No luck with SMC and PRAM reset. I removed the SSD internally, and connected it externally via SATA-USB (without replacing the HDD inside). I then had success when booting up from option with the SSD connected externally. The SSD is formatted as APFS. I was under the impression that Mojave will convert any HFS+ to APFS. My thoughts now are that it is either a a result of the APFS format, or the cable. However, the cable works fine when booting from my HDD. I was able to see that only 1 volume of the APFS format is mounted, and that is the SSD. I think two of the other three are for booting and recovery, but I cannot figure out how to mount them at the command line or otherwise. Any additional help would be greatly appreciated! Best, Courtney
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Hi all, I have recently purchased a Crucial SSD MX500 for my Mid 2012 Macbook Pro. I followed the Installation Instructions for Mac, and received an error when Restoring my SSD to Clone it. I formatted my SSD as a Mac OS Extended Journaled with a GUID Partition Table prior. I have also tried formatting it prior to restore as an APFS with a GUID Partition Table. The error I see states "APFS inverter failed to invert the volume - Input/output error / The operation couldn't be completed. (OSStatus error 5.) Therefore, I erased the drive again (Mac OS Extended Journaled, GUID Partition Table), booted into internet recovery mode, installed Mojave 14.1, booted up from the SSD and used Migration Assistant to transfer my data. All of this was done with my SSD connected externally via a SATA-USB cable. Upon installing the SSD, I see that Flashing Question Mark Folder (can't find system software). However, when externally connected, I have no problem booting up from the SSD when using option to select my start up disk. I have tried to do a lot of troubleshooting with regard to the APFS format required by Mojave, and have been unable to get my SSD bootable on it's own. Any help would be greatly appreciated. Thanks!
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