Can I trust it with my Mac? Your setup stays on your Mac.

Steer needs permission to click and type for you. Here is what it does with that access. No account, no tracking.

What Steer does with your Mac

Accessibility: So it can move the pointer, click and type. It can't do its job without it.
Input Monitoring: Steer doesn’t ask for it.
System Events: Asked once, the first time Window Snap uses the Mac's own tiling.

Never: What you type, and your mappings. They live in a file on your Mac you can open and read. The copy sold here has no iCloud sync.
Your licence key: Checked when you enter it, then on launch and about once a day.
Updates: Steer looks for one only when you ask.
A shared setup: Fetched only if you paste a link to one.

Scripts: An import can name a script already in Steer's scripts folder, never add its own.
Everything else: It can give a button a link to open, text to type or a Shortcut to run. Look at what a setup does before you import it.
Undo: Command-Z undoes an edit in Settings, and History goes back to an earlier point.

No private Apple code: Apple doesn't document some of what Steer does: real pinch and rotate, and talking to a controller's triggers, rumble and light. Steer works those out from scratch with the developer tools Apple publishes for everyone. The full account is on the features page.
What it can't do: The login screen and Touch ID stay out of reach. Where a controller can't do something, Steer hides it, and the controller page marks the gaps, including pads nobody has confirmed yet.

Or email steer@seanfloyd.dev. A person answers.