If you have the Linux install CD, you should be able to find the file that is the equivalent of the one we download in the instructions.
You will still need to install under Linux, because the Installer/unpacker recognizes OS X as an unsupported platform and aborts.
There should be no advantage to the CD over the Download -- both ar enterprise editions, and both will revert to Enterprise Developer versions (2 IP addresses) after 30 days, or until you supply a serial number.
When JRun 4 was first released, I downloaded and installed it (it did not abort on OS X), It seemed to work OK. Some months later, I downloaded a later version, but it wuld not unpack/install on OS X.
You could try the Linux version, using a procedure similar to the CFMX port.
Then, you would also need to port Linux CFMXJ2ee for JRun to run on Mac OS X.
AFAIK, there is a similar 30-day trial and then it/they revert to to a 2-IP developer version.
AFAIK, JRun has a configurator that allows you to connect to several web servers, including Apache.
So, this could work if JRun doesn't check for unsupported platforms at runtime.
It would be a pretty cool system, if it works!
However, I suspect that some of the advanced JRun features are platform dependent, so you may need to manually deploy applications, and you may not be able to use things like clustering, failover, etc.
These are all good questions. and it would be great to have a J2ee-compliant app server with the power of JRun 4 running on Mac OS X.
If you see a need for this, the best way to help make it happen is to submit a request to the Macromedia Wish List:
Every time I publish this URL, there is a surge of requests from Mac users -- and the MM people really notice.