a5200 vs Atari800MacX

a5200 has no write-up on Specifiction yet; its figures are above.

Atari800MacX is a free macOS application that emulates Atari 8-bit computers and the Atari 5200. It supports the Atari 400/800, 1200XL, XL/XE, XEGS and Atari 5200 systems, with cartridge and machine support, joystick input, full-screen or windowed display and hard-drive emulation. Save states and controller remapping are supported. A native Cocoa interface supplies preferences, menus, file associations and help, while libSDL is bundled in the application package. The emulator needs ROM image files from original Atari systems; those files are not included. Version 6.0.1 is the latest release listed, dated January 22, 2022, and requires OS X 10.12 or newer. Version 6.0.0 added support for ARM-based M1 Macs. Listed updates include synchronized sound, a graphical debugger, VAPI and PRO images, copy and paste, configuration files and a new hard-drive emulation scheme. Downloads include the application and source code. Development is described as sporadic due to work commitments.