I have an MBP with 8G of RAM and a 750G hard drive. It's only a year and a half old. Since installing Mavericks toward the end of 2013, I've been getting an increasing amount of hangs while in programs or trying to open them. The lag will sometimes be a couple of minutes before I can do anything. This isn't with anything fancy running (typically mail and safari and word). I've been considering a trip to the genius bar, but am not sure what they can even do when it is a problem that isn't consistently replicable. Some days it happens 30-40 times, and some days it's more like 10. If it was just the ball, no big deal, but the lag time is annoying. Is the general thought on fixing this issue right now that it requires a wipe of the hard drive and clean install?