wats up w maverick can't get in to wow...this is total man

hi eric, thz for response.

i have this 24 inch mid 2007 crazy imac i dig. it's really been great. i'm a artist, got all my pic's, does my prints, Photoshop, the whole 9 yards. i also play wow (world of warcraft) internet gaming. this computer came with snow leopard and every-time i logged on to wow it would tell to upgrade. so, i did, first i bought mountain lion , all cool, then the expansion came out and i was told to up grade again for better gaming... so, i went crazy and found out i should upgrade for the free download maverick... everything was working, after downloading a new wow patch (big expansion coming out, lots of prep), i boot, it stops at white background apple icon. i tried everything, after a goggle or two on my iphone i found a way to safe boot, this works but wow doesn't and it seems not to be 100%. i tried down loading maverick again, no go. so, i'm thinking of going back a step to mountain lion. i feel my computer is a bit out of date to handle these new osx versions. am i guessing right?