I'm having trouble updating Lightroom. Every time I try, after what seems like hours of installation time, it tells me I don't have enough space for the 1.28 GB update...which is ludacris because I have over 30 GB free. While this installation is happening, my entire computer slows to a crawl and I don't even try to do anything else. By the end of the crashed install the computer asks me to force quit everything and I have to restart. After the 3rd try, my old Lightroom seems to have disappeared, so now I can't even edit photos with the non-updated version.
Any thoughts on what might be happening here? My computer (a MacBook Pro, 4 years old) is up-to-date and running great otherwise.