Backup II v1.1: ProDOS 1.4 Incompatibility

There were numerous changes made from ProDOS 1.1.1 to 1.4, perhaps too many for Backup II v1.1. Backup II v1.1 was never updated to take advantage of the latest version of ProDOS, which supports the Apple IIGS.
If you're using Backup II v1.1, we suggest you go back to ProDOS 1.2 instead of 1.4, to have fewer changes in the operating system.

By not using ProDOS 1.4, all you'll be giving up is support for the Apple IIGS. ProDOS versions 1.3 and 1.2 work correctly on other systems, just not on the Apple IIGS.

Note: This incompatibility has been solved in the current version of Backup II (v1.1.1), which will function perfectly well with ProDOS 1.4, and which also solves some other problems found in Backup II v1.1, such as failures of the "restore" function.
Published Date: Feb 18, 2012