3.46 early 2009. I upgraded the CPU last year with two MPs. This one, my main, just slogs. Now I went to burn some CDs for a client and it managed to burn one, but now the Mac rejects every new black CD I put in. The 2nd Mac reads them fine. But I don't have the software I need to burn on the 2nd Mac. Arrghh! I blew compressed air in the open tray, repaired permissions and reset the pram. I recently moved so I can't locate my DW disk. Any si=uggestions? Is it just time to replace the drive?