I have a 2011 Macbook Pro 15" running Sierra.
The Macbook's fans are annoying me to no end - they are running most of the time I do serious work, right from the minute I start. It can get hot here in the summer, but it happens also at reasonable room temperatures, like right now, at 23°C (73°F).
Here's a graph of my CPU load over an extended period of time, looking fairly relaxed to my eyes:
yet the fan is running constantly:
This has been happening for the past three versions of OS X, so it's nothing version specific. (I started thinking that maybe this isn't normal only recently.)
Things I have tried:
- Made sure there are no processes running in activity monitor that hog a lot of CPU time (my work tends to be CPU/GPU intensive though, Photoshop, IDEs, etc. open in parallel all the time)
- Reset NVRAM and SMC, many times
Opened the device and removed a giant piece of lint from behind the air ducts (I was sure that'd fix it):
(I didn't do anything else in there other than remove the easily accessible, obvious blockage, though)
Is this normal? Is there anything I can do? Is there some unofficial way to get to the CPU, and maybe apply some better thermal paste? Is there some other potential bottleneck that I should look at other than CPU?
The machine is perfectly usable for me otherwise despite its age (after a RAM and SSD upgrade).