MacBookPro9_2.plist missing?

Question

After the Yosemite update I noticed that my computer (MacBookPro9,2) started running slower and hotter, and noticed that any fan sensor I tried displayed 0RPM, even though it seemed fixed at around 2200~ (default) and did not increase to match the temperature like it did before. Because of this my kernel_task would act up and sometimes spike to around 360%+ of CPU usage. After much digging around, I looked into the kext files and plugin families associated with the issue and realized that my model isn't listed in the resources folder? Is the missing .plist the reason why my computer spikes to deathly slow performance?

Answer 1

Not likely. But I do suggest that you do this:
Reinstalling OS X Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Reinstalling OS X Without Erasing the Drive
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the Macintosh HD entry from the the left side list.  Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit Disk Utility and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Also see:
Reinstall OS X Without Erasing the Drive
Choose the version you have installed now:
OS X Yosemite- Reinstall OS X
     Note: You will need an active Internet connection. I suggest using Ethernet
                 if possible because it is three times faster than wireless.