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Is my mid-2012 MBP overheating?

My mid-2012 retina 15" MBP has been getting increasingly hot for the past year or so. I think the trackpad has been causing some minor damage to the nerves in my fingertips (either from heat or worn-out finish, if that's possible).

These days, the CPU temperature typically gets somewhere around 160℉ and the palm rest temp gets somewhere around 85℉. You can view a full temperature breakdown here.

Are these normal operating temperatures? If not, what kind of tests can I run to determine what the problem is or what parts I might need to replace (fans, heat sink, etc)?]

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The temps are about normal, some are on the high side but not by much.

I would guess your system is likely dusty inside. A can of can'ed air a small soft paint brush to scrub the fan blades and heat sink fins is all you'll need here after popping the bottom cover following this IFIXIT guide: {MacBook Pro 15" Retina Display Late 2012 하단 케이스 교체|MacBook Pro 15" Retina Display Mid 2012 Lower Case Replacement]. Just be careful here as you don't want to damage your system follow good ESD protection practices as in the winter with the dry air it's a system killer.

As far as the trackpad: Have you tried clean it with some isopropyl alcohol? Slightly dampen a paper towel and tried just wiping it down, The trackpad surface is glass so I doubt you damaged it just from regular use. They do get dirty from the skin oils and other junk that gets onto them. Replacing the trackpad is not something I would recommend you try in this series as its a very big job. Best to bring your system into an Apple Store and let them do it if its that far gone.

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Why isopropyl alcohol?

Sorry for getting back to this so late.

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A high grade isopropyl alcohol will evaporate quickly, water won't which could cause more problems, and any cleaner will leave a residue which could damage the trackpad.

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