I am using Archicad 10 in a Mac computer. The computer's processor is a 1.6 GHz G5 and its memory has been upgrade to 2GB DDR RAM. My problem is that at times the program takes about a second or two to perform a command and while I proceed to execute a new command the Mac spinning beach ball comes up and my computer freezes up and I have to restart my computer. Now this has been happening in the past few weeks and I just wanted to know if anyone has had a similar problem and had managed to resolved it.[/size]