Arkos Tracker is available for Windows, Mac OsX and Linux. Make your choice!
Current version: V2.0.1 (March 2021) (changelog)
Minimum requirements: post-Windows XP.
Minimum requirements: at least MacOS 10.9 (Maverick).
Tested with Debian, Ubuntu and Mint.
Tested on Raspberry pi 4 (using Raspbian (Debian 11)). Thanks to Tugs for compiling it!