I installed Package Control in Sublime Text 3.

Assuming git is already installed, execute the following commands:

cd ~/Library/Application\\ Support/Sublime\\ Text\\ 3/Packages/
git clone git://github.com/wbond/sublime_package_control.git Package\\ Control
cd Package\\ Control
git checkout python3

After executing all commands, restart Sublime Text 3 and Package Control should be available.

[Reference Information]

・Install Package Control for Sublime Text 3 Beta

That’s all from the Gemba.