Peter just bought the new Mac Pro. Leo loves his. On his old Mac, he would be looking at videos off YouTube and would get a message that it requires a faster clock speed. Is the Mac Pro fast enough? Or will an i7 iMac be faster? Leo says the iMac isn't as fast and even if it was, he'd have to spend almost as much to get to that speed. The Mac Pro uses a Xeon Workstation processor with fast cores and data buses. So in almost all operations, it's fast enough.