Visual Studio 2022 won't connect via SSH on macOS after upgrading to Ventura

Question

I have a working setup with Visual Studio 2022 17.3.6 on a Windows laptop and Mac M1 running macOS 12.6.1. When I run an Uno project or a Xamarin project it connects as expected to the Mac. I just upgraded the Mac to Ventura and am no longer able to connect. I understand the only thing that has changed is moving to Ventura, but am stuck on how to proceed.

The exact error is:

An error occurred while trying to establish an SSH connection with SSH keys to 'ip:22'

I have tried the following:

• SSH from my laptop in Ubuntu for Windows- worked
• SSH from another computer- worked
• Verified Remote Login settings on Mac
• Ran ssh username@macip 'ls' and it worked
• Deleted %LOCALAPPDATA%\Xamarin\Monotouch - no change
• Reviewed Visual Studio log- no additional information
• Reviewed log on Mac and no additional information

Answer 1

One reason could be the fact that Ventura comes with OpenSSH_9.0p1. Starting with OpenSSH v8.8, RSA signatures using SHA-1 are disabled:

This release disables RSA signatures using the SHA-1 hash algorithm by default”.

Fix SSH(RSA SHA-1) not working in macOS Ventura

1. edit /etc/ssh/sshd_config and save it:

   HostkeyAlgorithms +ssh-rsa
   PubkeyAcceptedAlgorithms +ssh-rsa
   

2. reboot sshd

macOS Monterey and older versions used OpenSSH v8.6 or older, respectively.