Upgrading IntelliJ IDEA after Sierra Upgrade: does not have write access to /private/var

Question

Trying to upgrade Intellij IDEA from 2016.2 to 2016.2.5 and I am getting this error:

IDEA does not have write access to /private/var/folders/_q/7md3pcy1

Answer 1

It helped me to just use the Jetbrains Toolbox to do the whole upgrade. Worked like a charm, didn't need any command line incantations or mucking about with OS folders.