Hello everyone. So I've recently had a bit of a problem with my MacBook Pro. Every now and then it starts randomly lagging, even when I've only got a few tabs up with no other applications running. Sometimes when I play music the Mac has troube with the sound and I hear a... you know that sound a broken radio or phone makes? That "bzzzzhhhh"? Yeah, like that. My Mac is 13 inch version from 2011. Dunno how much about my Mac I'm supposed to post here so here's what I think you want to know. Processor: 2,4 GHz Intel Core i5 Memory: 4 GB 1333 MHz DDR3 Graphics: Intel HD Graphics 3000 384 MB Serial Number: C02H50HJDV13 Software: Mac OS X Lion 10.7.5 (11G63b) Sorry if this is the wrong section to post.