a2emu review
A free, cross-platform Apple II emulator focused on BASIC programs and runtime analysis.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
a2emu is an open-source Apple II emulator component of the Apple2TC project. It runs original Apple II programs, including Applesoft BASIC, and is aimed at developers experimenting with BASIC software, game behavior, and runtime analysis. The emulator provides text, GR, and HGR display modes, keyboard input, sound, and controls for high-resolution rendering and phosphor persistence. A browser version includes packaged example games, while other games can be loaded from the command line.
The project is free to use and openly licensed, with deployment options spanning cloud and self-hosted setups. Builds are described for macOS, Linux, Windows, and the web; the project notes that macOS and web builds receive regular testing. That range makes a2emu practical for developers who want to inspect Apple II behavior without committing to one desktop operating system. Support is community-based, so teams should be comfortable relying on project documentation and community discussion rather than a formal support desk.
Runtime analysis is the product's clearest differentiator. a2emu collects runtime information for Apple2TC's binary-to-C decompiler and includes tracing, echo options, and key replay for repeatable inspection. The emulator also accepts read-only Disk II images in DSK and DO formats, which suits running existing software but limits workflows that depend on writing disk changes. Save states are not part of the feature set, so users seeking checkpoint-based play or broader preservation workflows should consider another emulator. Choose a2emu when Apple II BASIC execution and analysis matter most; choose an alternative when writable disk images or save-state management are central requirements.
a2emu pros and cons
- Where it wins
- Runs Apple II programs, including Applesoft BASIC, with text and graphics modes
- Offers browser and desktop builds for macOS, Linux, Windows, and web
- Adds tracing, key replay, sound, and runtime data collection for Apple2TC
- Where it doesn't
- Disk II support is read-only for DSK and DO images
- Save states are not included
- Designed around Apple II programs rather than broader emulator workflows
a2emu fact sheet, pricing and score →
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