How to Install Eclipse IDE for Mac OS X 10.10 Yosemite
Getting-Started with Eclipse IDE for Mac
The Linked Unix Tutorial Shows You Step-by-Step How to Install and Getting-Started with Latest Eclipse 2020-09 R IDE on Mac OS X 10.10+ BSD.
Eclipse IDE is written in Java and it contains a base Workspace and an extensible Plug-in System for customizing the Environment.

Mac OS X Installing Eclipse IDE
Installing Eclipse IDE Standard on Mac OS X 10.10+
Installing Eclipse IDE for Java EE on Mac OS X 10.10+
Installing Eclipse IDE for Java on Mac OS X 10.10+