Max allowed PD on my MacBook Pro (macOS El Capitan) is PD 14, but I'm NOT allowed to activate this version. I'm getting the following warning: Unable to perform the operation. The license server rejects it. Please help....!
I have the same issue. Mac Pro (2008) running Mac OS 10.11.6. I get the same error message (The License server rejects it.) after entering my activation code.
