Given this is a non-trivial fix, VMware Engineering has been working hard on a providing a workaround which would still allow users to set a custom resolution from within the GuestOS. The reason for this behavior is that Apple has changed the way in which it remembers previously used modes and would automatically fall back to this versus retaining the custom mode using the Display Preferences. For customers who are running Mac OS X 10.9 (Mavericks) or newer in a Virtual Machine, you may have noticed that you can no longer set a custom display resolution beyond the default 1024x768 in either VMware Fusion and vSphere, regardless of the amount of video memory that has been allocated.
