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Parallels Server for Mac ceases to work properly after upgrade of Mac OS X to pre-release 10.6.5 beta builds.

Article ID: 9257, created on Nov 3, 2010, last review on May 7, 2014

  • Parallels Server 4.0 for Mac


After upgrading the host OS to Mac OS X Server to one of pre-release 10.6.5 beta builds (before 10H574) you may experience crashes of your Virtual Machines or the Parallels Server host itself.


If you need to work on a pre-release 10.6.5 beta build, you can use the following workaround.

Go to the Virtual Machine menu and select Configuration -->  Hardware -->  Boot Order -->  Boot Flags and set the following line to Zero:


Save the changes and start the virtual machine.

Important: This workaround should be applied to all VMs running on Mac OS X 10.6.5.

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