I've been using IntelliJ IDEA on my Mac for too long. My company asked me to use their laptop but I need all my plugins and settings. I've never used IntelliJ IDEA on another computer so maybe it's easy, I really don't want to install all the plugins one by one since there are too many.
Settings can be moved using File | Manage IDE Settings | Export Settings / Import Settings or the Settings Repository plug-in.
As for the plugins, just copy the plugins folder from one system to another.