CPU/Activity Monitor
My fan is running constantly on my My MacBook Pro 13" and when I open activity monitor, the top thing using my CPU at 95% is "Login Window"? I'm unsure of what this means?
Thanks Mid :)
Question marked as
Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379
Try resetting the SMC https://support.apple.com/en-us/HT201295
and test if no resolve—Try a SafeBoot https://support.apple.com/en-us/HT201262
Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc. Login and test. Reboot and test will take a little longer as caches get rebuilt.