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PRouleau Author

Level 1

14 points

Firewall is blocking Screen Sharing

I have a Mac mini (2018) and a M1 MacBook Pro (13 Inch, 2020), both running on Monterey 12.2.1. Both have Firewall turned on, and both have "Allow Incoming Connections" enabled.

I use Screen Sharing a lot in my home. The connection from my MacBook to the Mini works fine, but when I click on "Network: MacBook Pro" from my Mini, File Sharing works fine and I have access, but when I try Screen Sharing, I get the following error:

If I turn Firewall Off on the MacBook, then Screen Sharing works fine. Why does it work one way (MacBook to Mini) and not the other way around??

MacBook Pro 13″, macOS 12.2

Posted on Apr 2, 2022 11:02 AM

Top-ranking reply

Jack-19

Level 8

46,008 points

Posted on Apr 2, 2022 11:12 AM

Welcome to the Apple Support Communities.

From this article, About the application firewall - Apple Support,

Selecting the option to "Block all incoming connections" prevents all sharing services, such as File Sharing and Screen Sharing from receiving incoming connections.

Make sure "Block all incoming connections" is turned off.

If the issue persists, test in Safe Mode: How to use safe mode on your Mac - Apple Support.

Jack

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Firewall is blocking Screen Sharing

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