Salem

I didn't find any recent discussion about this, so I have to ask... Is it possible to run Salem on OS X?

I gave it a try and managed to start the installer, but I get a message saying "To view this web content, you need to install the Java Runtime Environment." I have Java 8 Update 25 installed.

Yes it works fine on OSX

Make sure that you have Java enabled in the browser. If it is not, then Java Web Start will not work. http://java.com/en/download/help/disable_browser.xml

There have been issues with Apple and Java in the past. Verify that Java is installed properly https://www.java.com/verify/ If not, uninstall Java and reinstall. I'm not familiar enough with Mac support to go beyond this, sorry.