Hi, I'm probably the new kid on the block. I have been a Mac user for a number of years starting with the Quadra 650, now with an iMac G5. I recently downloaded the latest upgrade of Skype. I guess it's version 5. I forgot to look for any limitations. Unfortunately upon downloading I got this: You cannot open the application “Skype” because it is not supported on this architecture. My bad! This version will only work with the dual processor machines. I sent several emails to Skype with no reply whatsoever. So I went into Time Machine, found the previous version but can't seem to bring it into the now. I would greatly appreciate any help with this.