MacsBug v. 6.1 supports the Macintosh Plus, Macintosh SE, Macintosh SE/30, and
the Macintosh II family. MacsBugs is compatible with all Macintosh monitor
configurations and all versions of Macintosh System Software, including
Multifinder. Version 6.1 of MacsBug does not work with the 64K ROMs (Macintosh
128K and Macintosh 512K) or the Macintosh XL.
MacsBug is available from APDA. You must acquire a license from Apple Software
Licensing before including MacsBug in a shipping product.