So I recently upgraded from the stock 4GB in my 2011 MPB to 8GB of RAM, and at this point, it just seems like a waste of money. After leaving my computer on for about 2 days, nearly all my memory has been moved to either active or inactive memory, with very little actually "wired" or "free". In fact, I have over 2 gigs of the wired and nearly 3 gigs of free. Many of you may say this is a good thing. OSX is optimizing my system by putting as much data into inactive memory as possible so it will be available on demand. The problem though, is that the OS fails to release that memory for other programs. If I launch a game (world of warcraft for example), it runs agonizingly slowly because the OS doesn't release the needed memory. I have to physically kill off processes such as Firefox, iTunes, Mail to free up this memory, which completely defeats the purpose of having more RAM in the first place. You can see the OS clears up about 50MB of RAM for the application. But it's still RAM starved. It need at least another 150MB of RAM to run smoothly, and the OS simply doesn't clear up this memory. I've been running a windows machine for the past 2 years with 4GB of RAM, and even running all these programs and games, I would still have at least 1.5GB of free RAM, and the OS was never slow at all. Everything about it was probably just as fast as OSX most of the time, and it did so with 6GB less RAM. Whats the issue here???