# finder
-   `cmd-shift-.` show/hide hidden files

## plugins
-   `brew cask install qlstephen` quicklook unknown file extensions as plain text
-   `brew cask install qlcolorcode` quicklook source code
-   `brew cask install qlmarkdown`
-   `brew cask install qlimagesize`

# jetbrains
-   `ctrl-shift-j` join lines`

# xcode
get old version from https://developer.apple.com/download/more/