Delphi Supported Operating Systems - ideasawakened/DelphiKB GitHub Wiki

As of Delphi 10.3 RIO Target Platforms Supported:

Windows (32 & 64-bit)
- Client (7, 8.1, 10)
- Server (2012, 2016)
macOS (32 & 64-bit) (10.13,10.14,10.15)
iOS (10,11,12)
Android (32-bit) (64-bit due in Delphi Rio - Update 3)
- Client side via licensed third party tool FMXLinux in Android 5,6,7,8,9
- Native server-side support in Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, RedHat Enterprise Linux (version 7)