daemons, although by patching the underlying OS code, they had the capability to modify existing OS behaviour, the other two did not.

The INIT mechanism

The concept of extensions was not present in the original Macintosh system software, but the system nevertheless had a private patching mechanism that developers soon learned to take advantage of - the INIT loader. This code would search for system resources of type 'INIT', and load and run them at boot time. The code resources

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