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Download and install the font

1. Download the Consolas font from http://www.fontpalace.com/font-details/Consolas/
2. Open Finder and navigate to Downloads directory
3. Double click the Consolas.ttf file
4. A dialog box appears displaying the details about the font
5. Click Install font button

Using Consolas font on IntelliJ IDEA:

1. Open IDEA Preferences Window (Press Command + ,)
2. Editor > Colors & Fonts > Font