Most remote software pushes your screen through the cloud of whoever made it. Mac@Xa skips that part: your two machines shake hands with each other, and the meeting point in between only moves bytes along, holding no key to open them.
A sleeping Mac drops its connection, and Wake-on-LAN cannot cross your ISP's router — which is where most remote software gives up. The Mac at home schedules its own wake-ups in hardware, opens an eye every few minutes to see if anyone is calling, and goes back to sleep after eight seconds if nobody is. Call while it sleeps and you wait in a queue, told exactly when it will wake — no guessing.
The machine at the café, a colleague's Windows laptop, the shared box at the office — places you cannot install software. Open Chrome or Safari, go to the remote page, type the ID and the code, and your Mac's screen is there. Same end-to-end encryption, and closing the tab leaves nothing behind.
The other tools all ship a vendor console. Whoever takes over that account reaches your Mac. Mac@Xa has no such door to take over.
It joins the two ends and copies bytes, nothing more. Session keys come from the 6-digit code PLUS a per-session ECDH secret it holds no part of, so all that passes through is random noise.
Both ends sign a fresh random challenge and compare proofs, and the session key also mixes in an ECDH secret the two machines exchange between themselves. Record the whole session and the code is still safe.
To the network you are sitting on, the session looks exactly like an HTTPS connection. No ports to request, no VPN, no static IP.
The app tries a direct connection first and only falls back to the server when that fails. You never pick a route; it takes the shortest one available.
H.264 runs on Apple silicon itself, so the Mac at home stays cool and the battery in your hand lasts a good deal longer.
The comparison describes how commercial remote-control software commonly works; individual products differ in the details.
Install the app on the Mac at home, give it a role, then type two numbers at the other end — from the app or from a browser, either works. Ten minutes or so, and nothing to disclose about yourself.
