Hi there all - I am not entirely new to Macs, I've had a few over the years, but I haven't used one as a daily machine in a few years so I've forgotten some of the basics. I bought a new 27" iMac yesterday and I've had it hang every hour or two since I've begun using it. If this were my Windows box, I could figure out what application or driver is causing the hang, but I'm feel like all-thumbs here, fumbling around looking at console logs and trying decipher what is a 'normal' error and which are concerning. Is there anything I should be looking for? I can see a few things stick out like a sore thumb... It is logging this error every second: Code: 10/20/13 6:31:23.000 PM kernel: SMC::smcReadKeyAction ERROR TC0D kSMCBadArgumentError(0x89) fKeyHashTable=0x0xffffff80dedeb000 The logs are literally full of that error... (edit) these seem to be related to one of the monitoring apps I had running. I stopped both of them and the scrolling errors seem to subside. But I think it was freezing before I installed them - I installed them because it was hanging and I was looking for an easy way verify it wasn't a heating or hung proc issue). It's a standard off the shelf config - nothing special ordered and no changes since I bought it. I have a second monitor attached and I've installed just a handful of applications - Chrome - Firefox - World of Warcraft - Silverlight - Flash - http://www.agileroute.com/cpuled/ - https://itunes.apple.com/us/app/systempal/id453164367?mt=12 Any suggestion on how to better read the console logs, what that error might be, and any other best practice Apple troubleshooting tips? Thanks a bunch!