MacBook Pro 5.1 (Late 2008) running 10.14.6 from DosDude1's Mojave Patcher for awhile on a 2.5" SSD. Everything's been fine.
I was excited because I was able to score a higher capacity M.2 drive. I bought a Sabrent M.2 SSD to 2.5-Inch SATA III Adapter (
https://www.amazon.com/gp/product/B01N6PMZLW/). I know it works because I've already used it a bunch of times on my main Mac Mini 2018.
I did a Carbon Copy Cloner exact copy of the old 2.5" SSD to the new M.2 2.5" and went to boot up it. Flashing folder icon at start.
Troubleshooting:
- Tried holding option down, doesn't even see the drive.
- Swapped the old SSD back in. Seen and booted just fine.
- Popped in the new M.2 2.5" into a USB docking bay. It's seen and shows up.
- It also sees it in the Startup Disk list, so I set it there. It rebooted, but back to the old SSD.
- Tried a PRAM reset, same result.
I am stumped. I was thinking that the 2008 MBP was too old hardware wise to be compatible with an M.2 drive SSD, even though it's inside a 2.5" case & interface. Seeing that it can be seen though when booted from the old SSD throws that mostly out the window.
The only thing I can think of is that I realized that my old SSD was formatted HFS Extended, while the new drive was cloned as APFS, and that maybe the combination of what the patcher has to modify in order to make the 2008 work on newer systems, as well as APFS being a newer format, are incompatible.
Any anyone encountered this before or have any ideas?