Mac mini Mid 2011 i5 2.3GHz (98% Idle) 500GB HDD (75% empty) 8GB RAM 1333 MHz DDR3 (70% available) 1 hour uptime Disk permissions repaired 2 hours ago Only Chrome and Mail running in the foreground Some tasks take a while to complete, and dont max (or even HEAVILY increase) CPU usage. For example, I can launch iPhoto (which takes 21 seconds to become fully operational) and 3 out of 4 CPU threads will remain 90% (or more) idle, while one thread will be nearly maxed. Why do some things seem to lag like this? All help is greatly appreciated!!!