Hi, so far my experience in Mavericks have been so so. It was suppose to be a speed increase over the whole system. But, its seems like my machine is doing so much stuff in the background that causes lags and stutterings. F.example, in League of Legends (the game) I get some fps slow downs. I dont think its the game, because the lags are irregular and not when huge battles are happening. But sudden moments the game start to stutter and then back to full fps again. SOme times the machine is writing to the secondary disk like crazy and I have no clue what its doing, if its indexing the files there or what?!? ALso, in Photoshop, I have a lot of smaller bugs happening now and then, like getting white menus and stutters too. WIth Lion I didnt have any issues. I have a iMac late 2012, with 768 gb SSD and 32gb ram top of the line gpu with 2gb Vram. ANy tips fon how to remove any of the quirks ?