Installing from the installer package results in an error stating "Parallels Desktop can be installed from a disk image only. His original post can be found here: Disable your mac's System Integrity Protection program. AKA the "Apple wants you to buy new crap" program.
Shut Down your Mac. This will boot up the mac into the Online Recovery Environment. Be patient, depending on your internet speeds, this could take awhile. Once the Recovery Environment is loaded, select the language you want to use. In the menubar, click "Utilities", and then click "Terminal", and enter the following command.
Please restart the machine for the changes to take effect. Step 2: Download the Parallels Desktop 9 installation DMG image directly from Parallels by typing the following web address into Safari or any browser: Do this by double-clicking on the file you just downloaded from Parallels. This opens a finder window with a single folder called "Contents". Open the "Contents" folder by double-clicking it. This opens a new finder windows with three folders, and one file.
Open the folder called "MacOS" by double-clicking it. Inside the "MacOS folder is a single file called "Install". Run the installer by double-clicking it. The installer will ask for an administrator username password, just like when installing any program.
Enter your username if not pre-filled and your password to give Parallels permission to install. Step 4: Re-enable System Integrity Protection. Step 5:
With the new Parallels Desktop 15 for Mac, you can seamlessly use Windows on your Mac, without rebooting. Easy Setup Download and install Windows 10 with just one click. Stay Synced Parallels Access lets you access your computer and files from anywhere.