Re-installing Homebrew and it’s packages when upgrading to the M1
Start by re-running the Homebrew install script which will give you the M1 homebrew in /opt/homebrew/bin. You’ll still have the old Install binary at /usr/local/bin/brew.
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
I ran into a git error and have to remove /usr/local/bin/git.
Update the .zshrc file with an alias to the Intel brew and add the new path:
alias oldbrew=/usr/local/bin/brew
First, look at the Intel packages you have installed
oldbrew list
Use a simple script to upgradepkg.sh:
#!/bin/bash
brew install $1
if [ $? -eq 0 ]
then
echo Removing old $1
/usr/local/bin/brew uninstall $1
fi
Remove packages with no remaining dependencies:
oldbrew autoremove