Announcing ProDOS 2.4.2 for all Apple II computers




ProDOS 2.4.2 is a minor release with bug fixes and updates. It replaces ProDOS 2.4 and ProDOS 2.4.1.


Bugs fixed:

 1. If a directory with more than 255 files was used, and then a different disk was used, a Bad Dir Error $51 was reported.

 2. Bitsy Bye was not compatible with the Appletalk Workstation card.

 3. Bitsy Bye was not compatible with the  Mac LC Apple IIe card.



 1. Thunderclock driver is updated for years 2018 – 2023

 2. ADT Pro v2.0.2

 3. Copy II Plus v8.4

 4. Added Cat Doctor’s extended utilities


If you’d like to help develop or test future versions, please contact me.




John Brooks

Twitter: @JBrooksBSI


Download Disk Image: ProDOS_2_4_2.DSK


If you’d like to support my efforts to improve the Apple II, donations are welcome.



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About the Author

John Brooks

Apple ][ developer since 1979. Professional game developer since 1987. Cofounded Blue Shift, Inc. in San Jose, CA. in 1995, a company which develops video games, embedded systems, and provides engineering consulting services.