First of all, you need a Java JDK installed. If you don't have it yet, get it directly from Oracle. We recommend to install both the latest Java 8 and the latest Java 11 versions, because Java 8 is where everything is solid right now, but 11 is where things are heading in the near future. If you are confused by a choice of different versions of Java 8, like 8u201 vs. 8u202, that doesn't matter much. Choose the one you will be using at deployment, which is usually the lower number of the two (the one without frills)it from Adopt Open jdk . As of January 2020, Eclipse install fails with Java 11-DCEVM, start with Java 8 and Install Java 11 after. To install a DCEVM and Hotswapper Java 11, you download prebuild binary here and install by extracting the archive in /Library/Java/JavaVirtualMachines/.
Head over to the Eclipse Foundation and download the latest version of Eclipse IDE suitable for your OS X version. At the time of this writing, that's 2018-12. Run the installer and follow the process, installing "Eclipse IDE for Java Developers". We don't need the EE stuff for Wonder. After completing the install, launch Eclipse to verify it's working. Close the welcome screen.
$ sudo mkdir -p /Library/WebObjects $ curl -O https://wocommunity.org/tools/WOInstaller.jar $ sudo java -jar WOInstaller.jar 5.4.3 /Library/WebObjects
If you already have the WebObjects543.dmg or the automatic download does not works use this variant:
cp WebObjects543.dmg /tmp/ sudo java -jar WOInstaller.jar dev54 /Library/WebObjects
Step 3: Link the Framework to WOlips through the properties configuration file