Logisim for macOS Catalina and newer
This is an Application Stub for macOS Catalina and newer to run Logisim without installing the old Java Runtime Environment.
Installation
Logisim requires the Java JDK. I recommend installing it with Homebrew.
After installing Homebrew, download and install Java as a brew cask in your Terminal:
$ brew cask install java
Next, download the Release-App (Logisim_v1.1.dmg) down below and drag it into your Applications folder.
Open "Logisim" and enjoy!
Note
I didn't develop the Logisim app! This is only an Application Stub to run it on macOS Catalina and never.
Credit: http://www.cburch.com/logisim/index.html