I've been keeping an eye on the resource manager and, to my surprise, the resource consumption doesn't add up with the speed (or lack there of) of the OS. Video playback is wonky in Chrome (using an older version, which may be the cause), switching between opened apps takes a good 5-7 seconds. Yes, I know it's a pretty old machine and the performance would be significantly lower compared to my main rig (it's essentially a 10 year gap worth of advancements and so on), but even after going in with little to no expectations, OS X feels, sluggish. Keep 10.7.5 and install Windows 10 alongside. OR, and I'm not sure this would really work Install 10.7.5 on a spare drive, wipe the drive already in the macbook and slap Windows 10 on it* Use recommendation to try mlPostFactor and install a newer version of OS X I'm currently looking at a couple options: It's currently running OS X 10.7.5, which is the latest officially supported version, which is where my issues begin. Sooooooo, I picked up a mid/late 2007 Macbook (A1181, can't really remember actual release) that had its memory upped to 4 gigs.

2007 macbook pro os x