Intellij Idea 14.1.4 Mac OS X Yosemite 10.10.3 and later.
From the IDE:
Import Project -> (Chosen directory to import) -> Import project from exter
For Windows Platform:
try Running the 64 Bit exe version of IntelliJ from a path similar to following.
note that it is available beside the default idea.exe
"C:\Program Files (x86)\JetBrains\IntelliJ IDEA 15.0\bin\idea64.exe"
link