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Tap the dot: the app tells you why and retries right away. Then check, in this order:

1. the Mac is on, awake and on the same network as the iPhone (the iPhone's Personal Hotspot works too);
2. on the Mac there's the T made of five keys in the menu bar: if it's missing, open TodrixPad from Applications;
3. on the iPhone, Settings › TodrixPad › Local Network is on;
4. on the Mac, System Settings › Privacy & Security › Local Network › TodrixPad is on.

If the Mac changes address, the app finds it again by itself.

TodrixPad has no Dock icon: it lives in the menu bar, at the top right (a T made of five keys). If the menu bar is full or there's the screen notch, macOS hides the icons that don't fit: hold ⌘ and drag the T further right, or remove icons you don't use. In any case, opening TodrixPad from Applications shows the welcome window with the status and all the commands.

From version 1.0.2 by itself: once a day it checks for a new version and offers it to you; from the menu › Check for Updates… you check right away. It installs only updates signed by TodrixPad. With 1.0.1 or earlier, download the DMG from the download page.

Yes: on first launch tap Try without a Mac, or turn on Settings › Demo mode. The keys control a simulated Mac; turn it off when you pair your Mac.

On the Mac: TodrixPad menu › Pair iPhone…. On the iPhone: Settings › Pair with QR code and scan the QR code (or choose the Mac in the list and use the 6 digits). Then on the Mac press Allow.

The QR code and the code are valid for 2 minutes and once only. The QR code is the safest way.

The pairing was revoked on the Mac, or the Mac's identity was reset. Pair again with the QR code. If you did neither and the message appears, don't connect: another computer might be answering.

On the Mac open the TodrixPad menu › Permissions… and grant what's missing. Screen Recording applies after restarting TodrixPad (there's a button in the window). If a switch is on but doesn't work, remove TodrixPad from the list with − and add it again with +.

With a monitor's speakers (HDMI, DisplayPort) macOS doesn't allow adjusting the volume, not even with the keyboard: use the Mac's speakers or headphones. Brightness changes the MacBook's built-in screen; external monitors usually don't allow it.

Settings › Edit keys: add, move, rename, change icon and action, and try the key before saving. In Suggested categories you'll find ready-made groups (Meetings, Development). The keys are also in the file keys.json, in the Files app › On My iPhone › TodrixPad.

The connection is encrypted (TLS 1.3) and the Mac accepts commands only from iPhones you paired and approved; in Settings › Paired devices you can revoke them. Commands that can run anything (shell and AppleScript) are off until you turn them on, on the Mac. Nothing goes through the internet.