On the off chance you’re a glutton for punishment, installed the Big Sur beta, and use Sublime Text, the current release of Package Control doesn’t work due to a change in how dynamic linker works in Big Sur. You’ll need to update Package Control beyond v3.2.0.

Package Control vendors the oscrypto module and the version in the current release is quite old (0.18.0). Oscrypto was updated in 1.2.1 to support Big Sur. Unfortunately, it’s been updated in Package Controll’s master but hasn’t yet been released.

I’m unsure whether there are breaking changes in HEAD, but Package Control seems to work after updating. The safest bet would likely be cherry-picking 32e44f7, but YOLO.

Postscript: I found an issue that describes the same and suggests running from HEAD on master as well.

The instructions for doing so aren’t particularly clear, so a quick run-down:

  1. Locate the the installed packages directory for your instance of Sublime Text, mine is ~/Library/Application\ Support/Sublime\ Text\ 3/Installed\ Packages (escaped for your convenience). 1. Check out the repository in the directory:
cd ~/Library/Application\ Support/Sublime\ Text\ 3/Installed\ Packages
git clone https://github.com/wbond/package_control.git
  1. Restart Sublime Text.