Hi,
You probably already know that running Fusion 8 on High Sierra is not supported.
This might -or might not- be the cause of your troubles, hard to say.
The one thing I would try in your case is to make sure that hardware acceleration is disabled.
Menu File -> Options -> Advanced ->
A question, when the program freezes, does the rest of the VM still work or is everything frozen?
--
Wil
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