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New Mac user here. I was wondering where do I go to see exactly how much of my computers resources I am currently using? thanks.

there is a program called "activity monitor" which is located in applications>utilities (or find it via spotlight)

the widget "istat pro" is also extremely handy.
 
Yeah, Activity Monitor is the way to go, and select "All Processes".

If you're a bit nerdy, you can fire up teh Terminal and type "top" :eek:
 
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