In versions 1.9.6 and prior, there is a known issue with OS X Lion running the Mac offline software as a client on an Eos, Ion, or Element system.
Symptoms of this issue include:
NOTE: The synchronization failed messages may also be caused by non-matching software versions. Also check that the software version on the console (which can be seen by pressing About with a clear command line) matches that of the client software (which can be seen by pressing Ctrl+/ with a clear command line)
The following workarounds are available:
This has been resolved in version 1.9.8. If you continue having difficulties after installing 1.9.8 or later, please contact ETC Technical Services.