Ipod 60 doesn't boot or appera on MAC-HELP?

MY IPOD AFTER 3 YEARS OF NORMAL USE DOESN'T BOOT BUT IT WORKS PERFECT WHEN ITS NOT CONNECTED TO MY MAC.I'VE ALRADY TRIED:

1)MENU+SELECT BUTTON

2)CHANGE USB PORTS

3)TRIED ON DIFFERENT MAC(3)

4)TRIED WITH OLDER ITUNES VERSIONS

5)HAVE OPENED DISK UTILITY TO REPAIR BUT

DOESN'T REPAIR(KEYS OUT OF ORDER,ETC)

MY OTHER IPOD WORKS AND CONNECTS PERFECT TO MY MAC.

IS THERE ANYBODY KNOWS WHAT TO DO TO MAKE IT BOOT AGAIN OR AT LEAST KNOWS HOW TO TAKE THE SONGS OUT BEFORE I RESTORE IT AND LOOSE IT ALL? PLEASE HELPIpod 60 doesn%26039;t boot or appera on MAC-HELP?
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