For what it's worth, we've been chasing the exact same issue for over a week and we're stuck, too. A fresh install of 6.0.x on our OS X 10.5.8 iMac developer environment keeps hitting the same error during installation. We've seen this with both 6.0.1 and 6.0.6 Network edition and Community edition.
After spending a _lot_ of time chasing DNS issues, it looks like the problem may actually be related to Java. We can get the installation to proceed past the point of error (the "Unable to determine enabled services from ldap." in te excerpt below) by doing a keytool hack, while the installer is still running.
Code:
...
Looking for valid license to install...license installed.
Starting servers...Unable to determine enabled services from ldap.
done.
Installing common zimlets...
com_zimbra_adminversioncheck...failed. This may impact system functionality.
com_zimbra_bulkprovision...failed. This may impact system functionality.
...
If we run the following command after the installer outputs "Deploying CA to /opt/zimbra/conf/ca ...done.", then at least the installation completes ... though the mailbox still refuses to start (fails with a socket binding error):
Code:
sudo keytool -import -keystore /System/Library/Frameworks/JavaVM.framework/Versions/A/Resources/Deploy.bundle/Contents/Home/lib/security/cacerts -file ~zimbra/ssl/zimbra/ca/ca.pem -alias zimbra
There appears to be something wrong with the OS X installation process ... has anyone developed a clean and tested procedure for installing 6.0.x on OS X 10.5?