Atari800MacX v4.5.0 is released. Atari800MacX is the Mac OS X port of Atari800, an Atari 800/800XL/130XL and 5200 Emulator.

Atari800MacX v4.5.0 Changelog:
Features Added/Changed:
- Added ability to change sound volume in the application through the sound menu or key combos
Bugs Fixed:
- Fixed issues with some TAB and ESC not being able to be entered in the emulator as well as some international key sequences.

Download: Atari800MacX v4.5.0
Source: Here