Sorry if this has been explained before so feel free to direct me to those threads. Question if using 10.6: If a program runs in 10.6 is there a way to tell if it will run in 10.7 before upgrading? Question if using 10.7: If a software package doesn't run in 10.7 is there a way tell why? Reason I ask is that my iMac is running 10.6 and the software works fine on my computer but doesn't on my wife's running 10.7 The software is for a medical practice (so it's not market saturated like Office, etc). The software doesn't say "compatible with 10.X and newer, rather it just says compatible with OSX. Their tech support isn't any help so I am trying to get smart on this. Thanks for any replies in advance!