I installed on my 15" MacBook Pro and immediately had overheating issues. The computer ran hot all the time, and drained the battery in less than an hour. I opened activity window and found that the processor was running @ 100% continually due to this piece of software. I uninstalled it and Clamxav and I have no more overheating issues. I also found others who were having the same problem in the Apple discussions forum and traced it to the same cause. Just thought you should know!