I have a new MacBook Pro 2.8 GHz Intel 2 Duo processor with 8 GB Memory. When I open Family Tree Maker for Mac 2 (FTMM2) and even after I close it, the processor is consumed, the fan runs very loud, the laptop runs very hot, and my battery life is less than 2 hours on full charge. I find this true even if the FTMM2program is closed.
The only way to free the processor that I have found is to go Applications - Utilities - Activity Monitor - and select FTMM2 and press the Force Quit "stop sign" icon and then the processor is freed from FTMM2's grip. This is very annoying and the software designers need to fix this ASAP. Hope this helps you.