Tuna Helper is an extension that is unknown to many, mainly due to its status as an invisible extension. It is present only if the System 7 Tune-Up 1.1.1 was installed on a System 7 Mac.

Under previous versions of System 7, an error occurred where folders and documents were disappearing after repeated operations in special proceudres dealing with floppy disks, folders, and the Desktop. The Tune-Up corrected this (but did not offer to restore any hidden icons).

Tuna Helper is located within the System file; it is not in the Extensions folder. It cannot be removed after Tune-Up 1.1.1 was installed on the Mac.

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