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Atari800MacX for Mac

By Mark Grebe Free

Key Details of Atari800MacX

  • Emulate Atari 800 on your Mac
  • Last updated on 09/16/20
  • There have been 3 updates within the past 6 months
  • The current version has 0 flags on VirusTotal badge_icon

Developer's Description

This is the home page of the Macintosh OSX Port of David Firth's Fantastic Atari 800 Emulator. I have ported the SDL version of this emulator to Mac OSX, and added a full native Cocoa interface, including Preferences, Menus, File Associations, Help and more. Unlike the first primitive release, it now does not require libSDL to be installed seperately, but includes it within the application package. It does however require ROM image files from the original Atari systems, which are not included here.

Full Specifications

What's new in version 5.3

  • Add continuous scaling of Atari display by simply dragging the window resize handle.
  • Added ability to set scaling to integer values only, still by dragging the window resize handle.
  • Changed Fullscreen to use true MacOS Fullscreen, with seperate workspace. This elimiinates the need for a Fullscreen GUI, since the normal Mac windows and dialogs work in Fullscreen now.
  • Added option to maintain Atari screen aspect ratio in fullsize
  • Added 80 column card selection pull down to Media Center
  • Add Touch Bar contatining special Atari keys for use on laptops with Touch Bars
  • Integrated features from atari800 emulator core, version 4.2, including:
    • Support for new ROM types
    • Added support for AltirraOS 400/800, AltirraOS XL, Altirra 5200 BIOS and Altirra BASIC. This means the emulator will now work out of the box without external ROMs
    • Many core emulator fixes around Pokey, ANTI, GTIA, PIA, and CPU.
    • Removed built-in Basic for 400/800 type machines for more accurate emulation, and removed seperate OS A/OS B machine types.


Release September 16, 2020
Date Added September 16, 2020
Version 5.3

Operating Systems

Operating Systems Macintosh
Additional Requirements
  • macOS Mojave
  • macOS High Sierra
  • macOS Sierra


Total Downloads 1,398
Downloads Last Week 1
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