Below is the list of Major errors in Mac machine
1) Group 1 error (Bus Error)
2) Group 2 error (Address Error)
3) Group 10 error (line 1111 trap error)
4) Group -36 error (I/O Errors (bummers)
5) Group -39 error (Logical End-of-file reached during read operation)
6) Group -43 error (File not found, Folder not found)
Source http://support.apple.com/kb/ht1618
