Use an Android emulator on your Mac, such as BlueStacks, LDPlayer, or NoxPlayer
Download and install the emulator from its official website
Open the emulator and sign in with your Google account
Open the Google Play Store inside the emulator
Search for Clash Royale
Install Clash Royale
Launch the game from the emulator
If you already play on mobile, sign in with the same Supercell ID to sync progress