I'm beginning to think I've made a massive mistake upgrading - if that's what you'd call it, to Mavericks. the last 24 hours since I installed it have been one issue after another. The latest is my mouse. I restarted my imac earlier, and afterwards, my A1015 bluetooth mouse (working previously) couldn't be seen by my mac. I searched online and found a couple of people saying I needed to delete a file called 'com.apple.Bluetooth' which I did. When I restarted again, after still not being able to pair my mouse, that file had come back, but there was still no connection. I'm pretty close to going back to Snow Leopard. Can anyone help? Thanks.