Warning: iOS is absolutely and completely unsupported.
Sitekick does not natively support Mac computers. However, Bluestacks (a program that emulates Android) is available on Mac. You can install Bluestacks on your Mac, then install Sitekick within the emulator.
Sitekick Remastered is not available for iOS devices. It is only available on Android, Windows, and Xbox. You can however install an Android emulator on an iOS device as long as you have a jailbroken device. If you don't have a jailbroken device, you will be unable to play.
If you're comfortable with Jailbreaking your iOS device, you may be able to install UTM (iOS 11 or higher), install an Android emulator, then install Sitekick Remastered from within the emulator.
We don't provide any support or how-to for jailbreaking your device or installing UTM, but you can read more about each below:
Jailbreaking information can be found onTheiPhoneWiki.com
UTM documentation can be found on getutm.app