Teleroam
Download
One app goes on the Mac you want to reach. Your phone and any other computer open it in a browser; nothing to install there.
Mac app
Version 0.2.18 · macOS 14 or later · Apple Silicon and Intel · about 1 MB.
Unzip it and open Teleroam. It offers to move itself to Applications, then its Mac Setup page walks you through everything it needs. It isn't in the Mac App Store because the store's rules block the screen control it needs.
It's signed with Apple and notarized, so it opens like any other app. macOS asks once whether to open an app downloaded from the internet; click Open.
The app checks for updates once a day and shows an Update button when there's a newer version.
iPhone
Get the iPhone app through TestFlight, Apple's app for early builds. On your iPhone, open the invite link below, install TestFlight if it asks, then install Teleroam.
Open Teleroam on the iPhone and scan the QR code under Your own devices in the Mac's Teleroam window. That's it: your Mac is on your phone, at home or away, no VPN needed.
No app? Scan the same QR code with the iPhone camera instead. It opens in Safari; tap Share → Add to Home Screen for a full-screen icon.
Any other computer
On a work PC, a library computer, or a friend's laptop, open the link shown under Let someone in in your Teleroam window (it's also in Settings on your phone). Type the 6-digit code from your phone, tap Allow there, and you're in. Chrome, Edge, and Safari all work. Nothing gets installed, and closing the tab leaves nothing behind.