macOS

#macOS firewall

The macOS firewall can stay on. On first start, macOS asks whether Tact-VC may accept incoming connections. Click Allow.

If you clicked Deny:

1. Open System Settings → Network → Firewall → Options.
2. Find Tact-VC and set it to Allow incoming connections.

#Security programs

• Outgoing firewalls such as LuLu or Little Snitch block the app silently until you allow it. Watch for their prompt on first start.
• Antivirus and security suites with a network filter: allow Tact-VC in their settings.

#Local Network permission

Without this permission, friends on the same network (at home, in the office) can't reach you, and Tact-VC can't talk to your router. Friends over the internet still can.

1. Open System Settings → Privacy & Security → Local Network.
2. Turn Tact-VC on.
3. If it's already on but System permissions in Tact-VC still says Blocked, turn it off and on again, then restart Tact-VC. After an app update, macOS sometimes keeps a switch that no longer applies to the new version.

#Check it worked

Settings → Help → System permissions shows Allowed everywhere, and Check my network passes Replies.