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Thank you very much! I got it and everything was going well with the key.
Thank you Swati, I bought PD9 for Mac then almost 2 years later bought PD11 Upgrade for Mac from a reseller. I've cleaned everything in my Mac...
I bought Parallels Desktop 9 for Mac at the first time around 3years ago then I upgraded it to Parallels Desktop 11 for Mac Upgrade in November...