Generally content developed with Unity can run pretty much everywhere. How well it runs is dependent on the complexity of your project. More detailed requirements:
Desktop:
OS: Windows 7 SP1+, macOS 10.12+
Memory: 4GB ram
HD: 1GB free disk space
iOS application requires iOS 9.0 or higher.
Android: OS 4.1 or later; ARMv7 CPU with NEON support or Atom CPU;