Hi, facing some problems with my old MacBook Pro 13 mid 2010 2.66 GHz duo. I upgraded it few months ago with an SSD Crucial 1TB and 8 GB ram. All fine ! Two week ago after a reboot shift buttons and power button started not to work but speed was still ok. After that it started to become super slow and also making command + R, initializing the SSD and reinstalling Mac OS problem remain. I ordered the keyboard + backlight to be replaced but at this stage not sure if I should change the motherboard or what else I should do..........thanks for your help / suggestions
I am just guessing, but maybe the hard drivel cable is bad and/or somewhat loose. You could start by checking the cable and replacing it if necessary...
If that not the issue, maybe neither the TRIM, nor the Crucial SSD built-in Active Garbage Collection works. Crucial SSDs do support TRIM command in addition to the built-in garbage collection.
The TRIM has been supported in OSX since El Capitano, but it had to be enabled manually in third-party, a.k.a not Apple SSDs. In later versions of OSX/macOS, TRIM might be enabled by the OS automatically or might not. You can check TRIM setting in "
About this Mac\System Report...\SATA/SATA Express" and manually enable, if it says "No".
Crucial SSD built-in Active Garbage Collection only works when the system is at idle. You can try disabling sleep and let the system idle for awhile. You may or may not recover the initial performance levels.
At this point, I'd secure erase the Crucial SSD, reinstall macOS, check if TRIM is enabled and disable sleep for the system. If you still have the same issue with the performance, then the issue is not the SSD.