Update README.md

README.md

@@ -4,6 +4,13 @@
 
 An island manager for Animal Crossing: New Horizons. Allows you to manage as many islands as you want, currently supporting Yuzu and Ryujinx emulators. Written in Java using JavaFX, includes integration tests to ensure safety of island management.
 
+## Platforms
+**Full Support:** Windows
+
+**Partial Support:** Linux and Mac.
+
+While they build successfully and all tests pass, Linux and Mac have not been tested yet, so try at your own risk. After some confirmation of its stability, I will mark them as fully supported.
+
 ## Features
 * Switch another island with the local save on your chosen emulator
 * Add fresh new islands