I had no problem with 10 Advanced, Trial 11, and Trial Server Advanced all at the same time.
Thanks for input, but you're on a MAc so could there are different issues.
I run FMP 5.5, 10 and 11 on my Windows XP system development machine and have had no major issues. I don't use IWP so can't comment on whether there are any issues there.
This is good to Know, I wanted to use our upgrade from 10 to 11 but had some issues making Runtime versions in 11 so I did not install it...Now I will...
Thanks - will try version 11 advanced now.
A warning from TSGal that I've copied from another thread:
In Windows Vista and Windows 7, a conflict will occur if you run FileMaker Pro 10 and FileMaker Pro 11 on the same computer with Instant Web Publishing enabled in both versions. Because both versions of FileMaker Pro use the same port number and the same "web.prefs" configuration file for Instant Web Publishing, you cannot run both versions of FileMaker Pro with Instant Web Publishing enabled at the same time. The "web.prefs" file for FileMaker Pro 10 does not work with FileMaker Pro 11, and vice-versa. To avoid conflicts, enable Instant Web Publishing in only one of the versions of FileMaker Pro running on the same computer. If you must switch between versions of FileMaker Pro with Instant Web Publishing enabled in both, you must use the following instructions to delete the "web.prefs" file each time you switch:
1. Turn off Instant Web Publishing in one of the versions of FileMaker Pro and then exit.
2. Delete the "web.prefs" file in: Users\%UserName%\AppData\Local\FileMaker
3. Start the other version of FileMaker Pro and turn on Instant Web Publishing.