Just now I downloaded multiple times the 10.0.2 version of PhpStorm for OSX. The sha256 sum matches perfectly. I can mount the dmg and drag the app to the Applications folder. However, if I try to start PhpStorm I get the following error:
Is anyone seeing the same issue? Here is the direct link to the download I have been doing tonight: https://download.jetbrains.com/webide/PhpStorm-10.0.2-custom-jdk-bundled.dmg
FWIW, I'm on El Capitan.