Some 0.90a builds retained access to debug commands (F1 menu) not found in the standard retail version.
It may default to a low resolution (800x600); you must manually edit the main_settings.cfg file to set modern aspect ratios. File: Amnesia-version_0.90a-mac.zip ...
💡 This is a historical artifact . For the best experience, the Steam version is recommended as it is fully updated for modern systems. Some 0
Common if the Mac's security settings (Gatekeeper) block the unsigned legacy binary. File: Amnesia-version_0.90a-mac.zip ...
This version was often distributed to reviewers and early testers shortly before the official September 2010 launch.