OG Link https://sonic3air.org/

Github Test Link Releases · Eukaryot/sonic3air (github.com)

Windows ver https://sonic3air.org/downloadgame_win2.php

Minor https://sonic3air.org/downloadgame_win.php

Preview ver https://sonic3air.org/downloadpreview_win.php

Linux ver https://sonic3air.org/downloadgame_linux2.php 

Linux Minor Ver https://sonic3air.org/downloadgame_linux.php

Linux preview ver https://sonic3air.org/downloadpreview_linux.php

Mac ver https://projects.sappharad.com/s3air_mac/sonic3air_mac_210928.dmg

Before downloading, please make sure you have the Steam version of Sonic 3 & Knuckles  installed 

The macOS port by Sappharad.
Before downloading, please make sure you have the Steam version of Sonic 3 & Knuckles  installed 

View changelog 

https://sonic3air.org/changelog.txt

Linux view changelog ver

https://sonic3air.org/changelog.txt

Mac view changelog 

https://projects.sappharad.com/s3air_mac/changelog_mac.txt

Sonic 3 A.I.R. (sonic3air.org) Android Ver

Sonic 3 A.I.R. Switch Port (jojudge.com) Modded Switch Ver

v22.01.09.0 Is Out! Test Only Windows