a2m review
A free, open-source desktop emulator with unusually deep tools for Apple II development.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
For developers and curious users exploring Apple II software, a2m is a desktop emulator for Apple II+ and Apple IIe Enhanced. It runs on Windows, macOS, and Linux, and combines machine emulation with development tools rather than focusing only on running disk images. The project is open source under the Unlicense, with separate licenses for some third-party code, and is free to use. Its fit is strongest for solo desktop users who want an emulator and a built-in environment for examining or writing 6502-family software.
Media support covers supported Disk II floppy images, including NIB and DSK formats, plus DO and PO images; it can also read WOZ images. SmartPort block images include PO, HDV, and 2MG, and host folders can be mounted as ProDOS volumes. Saved machine snapshots can be restored later. This range suits users moving between disk-based software and development workflows, though WOZ support is read-only. SDL joystick and gameport input, along with Mockingboard audio emulation, also serve users interested in software that relies on those peripherals.
The standout development features are an integrated debugger with stepping, symbols, breakpoints, and watchpoints, plus a built-in 6502 and 65C02 assembler. That makes a2m a more targeted choice for software development and exploration than for someone seeking only a straightforward gaming emulator. There is a project-continuity caveat: the original repository is archived and labels a2m retired, while saying development continues in the machines monorepo. Choose it for its combination of development tools and Apple II+ / enhanced IIe emulation; consider alternatives if you need broader model coverage or write support for WOZ images.
a2m pros and cons
- Where it wins
- Emulates Apple II+ and Apple IIe Enhanced models on Windows, macOS, and Linux
- Includes a debugger with stepping, symbols, breakpoints, and watchpoints
- Built-in 6502 and 65C02 assembler, snapshots, joystick input, and Mockingboard audio
- Where it doesn't
- Focused on Apple II+ and enhanced IIe rather than broader Apple II model coverage
- WOZ images are read-only
- The original repository is archived and marks a2m retired
a2m fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update