CocoaMSX v1.2 is released. CocoaMSX is an open source MSX emulator for OS X.

Features:
Based on blueMSX, one of the most accurate MSX emulators currently available
Built-in support for 3 virtual systems, automatic download and installation of over 200 MSX systems
Built-in support for cartridge (ROM) files, optional support for diskette (DSK) and cassette (CAS) files
Support for pasting text directly into MSX
Support for MSX-Music, MSX-Audio, Moonsound, SCC and PSG sound systems
Various video effects, such as scanlines and signal noise simulation
Snapshots with Finder previews
Support for MSX joysticks, joypads and mice
Flexible keyboard and input peripheral configuration
Screen capture
Audio capture
Gameplay capture
MSX Mouse support
Mixing for all six sound channels (PSG, SCC, MSX-Music, MSX-Audio, Moonsound, Keyboard)
Full screen support, including enhanced full screen on Lion and higher
Automatic updates

CocoaMSX v1.2 Changelog:
* Removed the black side borders from the main emulator window
* Improved mouse support (press Cmd+Click to disengage mouse mode), as well as new mouse configuration options
* Option to enable/disable status bar (now off by default)
* Improved machine selector - now on a separate tab in Preferences. Download, install and uninstall machines automatically. Special thanks to the blueMSX team for providing server hosting
* Improvements to the keyboard editor, including automatic layout detection and more intelligent key editing
* Limited gameplay capture and recording
* Mixer configuration options - control volume and balance of all six channels
* Ability to paste text into the MSX computer (by simulating keystrokes)
* Lots of bug fixes



Download: CocoaMSX v1.2
Source: Here