When selecting the best software to change voice on Mac, you should look for the following qualities.
Wide variety of features: A good voice changer application for Mac should possess a range of features, such as real-time voice changing.
Compatibility with VoIP applications: Though not necessary, it is an excellent thing if the voice changer is compatible with apps like Viber, Skype, etc.
Supports games and streaming: Like many others, if you are also looking for a voice changer to have fun while playing games, the app should support all games like Battlefield 2, etc. Moreover, it should also be compatible with game streaming apps such as Twitch, YouTube, etc.
User-friendliness: The best voice-changing software for Mac should provide you with a smooth experience, and you should be able to use it easily.