I need to replace the HDD on a 2010 iMac (27 inch A1312) - its unfortunately one of those models that used the built in hard drive's temperature sensor rather than a surface mounted one.. In this case ...

I've got a mid-2011 iMac with a 1 TB spinning drive that is failing. The computer has been running very slow for quite some time, a format and reinstall of OS X didn't help (had been upgraded several ...