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ERROR: Unable to save the configuration because it is invalid

  • Parallels Desktop 9 for Mac
  • Parallels Desktop 8 for Mac
  • Parallels Desktop 7 for Mac


Parallels Desktop displays the following error:

Unable to save the configuration because it is invalid.


This may happen if the MAC address in the virtual machine configuration is incorrect.


1. Make sure your virtual machine is stopped;

2. Open your virtual machine configuration editor, go to Hardware tab and click on your network adapter (check all of them if necessary):

3. Make sure that MAC address there complies with the following format:

XX:XX:XX:XX:XX:XX, where X is either a number from 0 to 9, or a letter from A to F, case-insensitive.

Example: 01:23:45:67:89:ab

See this Wikipedia article for more details:

MAC address

4. If you are not sure or there is no difference which adapter you have, you may press the Generate button on the right. It will generate a valid MAC address for your virtual machine.

1e0c43ccf6ca78fa6744efc9edbc0659 1e5db16426987d561060acdf56d947b4 33c4522b6fa9ca8e050f19b889fb58f1 790d27220dd34433ff172f45c18cfb98 48e7cf384e3b46432e32e6040476f122

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