In addition to the new games, there's support for the Macintosh version of Discworld 1. On the LucasArts side, music has been improved in the Macintosh version of LucasArts adventures, and there are major bugfixes to the bike fight sequences on Old Mine Road in Full Throttle.
There are also other changes included as well, such as an update to the latest Roland MT-32 emulation code, a new grid chooser for save games, an extended FluidSynth configuration dialog, and Belarusian, Finnish and Galician translations for the GUI dialogs.