Yosemite: How do increase font size of Eclipse globally?
Solution for Eclipse Oxygen at MacOS High Sierra (Dec 2017)


Open terminal and run commands:

cd /Applications/Eclipse.app/Contents/Eclipse/plugins/org.eclipse.ui.themes_1.2.1.v20170809-1435/css

vim e4_basestyle.css

Add a style:

* {
    font-size: 14;
}

Restart Eclipse to apply changes.