I keep reverting back to Toast 10, because all of the newer ones are SLOW. I do not understand why they can not burn discs faster. Toast 10 runs circles around 11 through 15 ( I won't upgrade again if they can't get this fixed). The worst thing is that when I am running Toast 11 or higher in the background behind other program windows, it slows to an absolute crawl. Why is this?? My machine is no slouch - 8 core Mac Pro, with 24 GB of RAM. If Toast 10 can run full speed behind other windows, why can't the newer ones?? If anyone can help me get this figured out, your input will be greatly appreciated. Thanks in advance.