Fix "unsupported new OS, trying as if it were 10.6-10.7" from reattach-to-user-namespace on Mountain Lion (probably in tmux).

gistfile1.txt

# Start by checking if they fixed it upstream:

brew update
brew upgrade reattach-to-user-namespace 

# If it says it's already installed, they haven't fixed it upstream. So do this:

# Edit the recipe:
brew edit reattach-to-user-namespace

# In your editor, change:
# dadea0aa48259c704d0b412b9588de2f5623e323 (on line 6) to ece1935953593d05e98d8c3ee8f956b2429d633f
# dadea0 (on line 7) to ece193

# Install the edited version:
brew upgrade reattach-to-user-namespace 

# Done!

This worked for me after the Big-Sur update. Thanks for sharing.

Cheers! (works when updating to Big Sur)

Worky, works after upgrade to Bigsur!