mac-german-ibm-keylayout

install:

• copy to /Library/Keyboard Layouts
• open keyboard preferences, 4th tab (very right),
• others, +, select the layout to add

based on:

• win-germany: https://jankarres.de/2013/07/windows-tastaturlayout-unter-mac-os-x/
• PC-Tastatur105: https://outofdataerror.wordpress.com/2014/09/11/34/ (https://github.com/memm74/PC-Tastatur105.keylayout)
• pc_tastatur: https://www.administrator.de/wissen/deutsche-pc-tastatur-apple-mac-einrichten-221078.html

customize:

brew cask install ukelele