Table of Contents
I wrote how I solved the error in Homebrew, “Error: Cask adoptopenjdk8 exists in multiple taps”.
Environment
- macOS Mojave Version 10.14
History
When I try to install Ruby 2.1.5 with RVM, the command brew cleanup is automatically executed and I got the following error messages. The command that I used for Ruby installation was rvm install 2.1.5. Of course, when I executed brew cleanup alone, I got the same error messages,
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Error: Cask adoptopenjdk8 exists in multiple taps: homebrew/cask-versions/adoptopenjdk8 adoptopenjdk/openjdk/adoptopenjdk8 |
I tried to solve the issue with brew untap as follows, but I only got error messages.
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brew untap homebrew/cask-versions/adoptopenjdk8 brew untap adoptopenjdk/openjdk/adoptopenjdk8 |
brew tap --repair didn’t help me.
brew upgrade calls brew cleanup, and it failed.
Solution
Uninstall and reinstall Homebrew. After Homebrew reinstallation, there’s no need of other configurations.
- Uninstall
-
1ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"
After executing the command, you will get the question, “Are you sure you want to uninstall Homebrew? This will remove your installed packages!” and press
yand proceed. - Installation
-
1/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
The Ruby was easily installed with rvm install 2.1.5 after Homebrew reinstallation.
Caution
Some application disappeared. So I had to reinstall them.
- psql
Reinstalled with
brew install postgresql. The data did not disappear.- mysql
Reinstalled with
brew install mysql. The data did not disappear.- mongo
Reinstalled with
brew install mongo. The data did not disappear.- pyenv
Reinstalled with
brew install pyenv. Installed Python did not disappear.- R, RStudio
Reinstalled with
brew cask install r rstudio.
Condition for the error
If you upgraded macOS to Mojave after Homebrew installation, the error can appear. I was in the same situation.
