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Hello, I have a Macbook Air 13” late-2010 (A1369) that I purchased second hand. It’s really slow and the fan is loud when doing simple tasks. The battery also depletes in about an hour of moderate use although I am aware that I will need to replace the battery as that is a separate issue. I’ve attached a screenshot of About This Mac.

Could it be possible that my current SSD is causing these issues? I ran a disk speed test and it’s showing this: read: 140.7 mb/s write: 206 mb/s I’ve got another laptop (Macbook Pro) and its SSD read and write speeds are under 500 mb/s and runs really fast. Should I just replace the SSD with one that has fast read/write speeds? Any suggestions would be really helpful! Here is a TG Pro screenshot on the MacBook Air’s Diagnostics:

Thank you!

SSD drives do not cause CPU throttling and full speed fan spinning but batteries do. Try unplugging the battery from the logic board and see if things get back to normal running the Mac from MagSafe only, if that’s the case you just need a new battery. If you get no change in picture without battery there are a number of things that may cause such issue, a faulty keyboard/trackpad cable, an SMC issue, and so on… hard to tell without previous history.

OK, clearly the Fan is out of wack! So is this just a bad fan or something deeper? As you also state the system is slow we can surmise SMC is telling the CPU to run in Safe Mode which means either a sensor is telling SMC the system is hot or is failing to detect either the temp or the voltages are not correct on the logic board. As we can see all of the thermal sensors here are all within reason, we know one of the voltage sensors has failed. If you got the full version of TG Pro it might have given us a bit more. Did the seller give you the original USB drive that came with the system? If he did you could give the diagnostics on it a try. Even still you will need the proper tools and access to the schematics and boardviews to locate the bad component and lastly access to the needed part. The other direction is just replace the logic board Logic Board 2.13GHz (4GB CTO) Apple P/N 661-5734 this being the best board you can get and worth getting as an upgrade for your current 1.86 GHz 2 GB board and for some reason cheaper! Logic Board, 1.86GHz, 4GB RAM

SSD is performing fine for this model. The heat and battery drain is due to software load becomes too much for this old rustbucket. Check task manager or whatever it is called in macOS to identify what process is hogging the system during idle. If nothing, then this system is too old anyway.