Switch for Mac isn[SQ]t a single, universally known application. There are several apps and utilities with "Switch" in their name for macOS. To answer your question accurately, I need more context.

Could you provide more details? For example :

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What does it do?

(e.g., manage windows, switch between accounts, manage network connections, etc.)
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Where did you hear about it?

(e.g., a website, a friend, an advertisement)
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Any other keywords associated with it?

With more information, I can help you identify the specific "Switch for Mac" application you[SQ]re looking for.