Convince Eclipse to use other JavaVM than default
Just edit eclipse.ini file (macOS path: /Applications/Eclipse.app/Contents/Eclipse/eclipse.ini). In this file, somewhere before -vmargs add:
--vm
/Library/Java/JavaVirtualMachines/jdk1.8.0_73.jdk/Contents/Home/bin/java
Where /Library/Java/JavaVirtualMachines/jdk1.8.0_73.jdk/Contents/Home/bin/java points to JDK 1.8.0 on MacOS. Adjust path depending on your system and desired Java version.
File should look similar to:
-startup
../Eclipse/plugins/org.eclipse.equinox.launcher_1.4.0.v20161219-1356.jar
--vm
/Library/Java/JavaVirtualMachines/jdk1.8.0_73.jdk/Contents/Home/bin/java
--launcher.library
../Eclipse/plugins/org.eclipse.equinox.launcher.cocoa.macosx.x86_64_1.1.550.v20170928-1359
-product
org.eclipse.epp.package.jee.product
-showsplash
org.eclipse.epp.package.common
--launcher.defaultAction
openFile
--launcher.defaultAction
openFile
--launcher.appendVmargs
-vmargs
-Dosgi.requiredJavaVersion=1.8
-Dosgi.instance.area.default=@user.home/eclipse-workspace
-XX:+UseG1GC
-XX:+UseStringDeduplication
--add-modules=ALL-SYSTEM
-XstartOnFirstThread
-Dorg.eclipse.swt.internal.carbon.smallFonts
-Dosgi.requiredJavaVersion=1.8
-Xms512m
-Xmx5120m
--add-modules=ALL-SYSTEM
-Xdock:icon=../Resources/Eclipse.icns
-XstartOnFirstThread
-Dorg.eclipse.swt.internal.carbon.smallFonts