Error Parallels 15 macOS Big Sur Beta 3

Same problem here. Beta 2 it was still working :(

I learned from Parallels forum that the problem was caused by version check of Parallels.
The solution is first set the environment variable "SYSTEM_VERSION_COMPAT=1" , and then use command 'open -a "Parallels Desktop" ' in terminal to run PD. Now PD15 can start

Thanks billxiong!

How do you set the environment variable "SYSTEMVERSIONCOMPAT=1" for PD15?

@StarLavaLord
export SYSTEMVERSIONCOMPAT=1

Hi, how to export SYSTEMVERSIONCOMPAT=1

That's a command for Terminal. Do a search for Terminal.app and run it. Then type:

Code Block 
export SYSTEMVERSIONCOMPAT=1

and press return. That's telling your system that whenever an application asks it for the value of "SYSTEMVERSIONCOMPAT", respond with the number 1.

This worked for me as well. Thanks to @billxiong!

EDIT: I should note that I first had to install the app from the dmg I downloaded from the Parallels website. Once I opened the DMG and was presented with the Instal.app on screen, I ran the following in the Terminal:

Code Block 
open -a '/Volumes/Parallels Desktop 15/Install.app'

This successfully ran the installer. Now that Parallels is in my Applications folder, I can now run it by typing:

Code Block 
open -a 'Parallels Desktop'

Not working for me with "export SYSTEMVERSIONCOMPAT=1" this solution


Still the same

Parallels Desktop cannot be started because some of the required components are missing from the operating system of your Mac.

Delete you current Parallels installation and get from the App Store. Note you will need to be on The subscription (option for this to work)

I tried the App Store Solution and didn't work for my license.
Right now I'm stuc and need to access my virtual windows.
Tried the terminal.app solution and didn't work as well.

Evan solution is correct, the only issue is the export

It should be

Code Block 
export SYSTEM_VERSION_COMPAT=1  

then run

open -a '/Volumes/Parallels Desktop 15/Install.app'

with the mounted download.

works fine , so... it is not possible to enter configure of the parallels,
the program is not responding((((

Hey it didn't work "export SYSTEMVERSIONCOMPAT=1" for me I tried it many times but it is not working.
Also opening it doesn't work it comes to have the same error.

My startup script (called is parallels.sh)

Code Block 
#!/bin/zsh
export SYSTEM_VERSION_COMPAT=1
open -a Parallels\ Desktop.app

Parallels inittool looks for system version 10.x, in beta 1 and beta 2 MacOS reported 10.16 as the system version from beta 3 onwards the system version is 11.0 and NOT 10.16 so Parallels inittool stops.

Code Block 
export SYSTEM_VERSION_COMPAT=1

makes the system report 10.16 again. (check with sw_vers in terminal).

Code Block 
Look at ProductVersion:
~                                                                              
▶ sw_vers
ProductName:	macOS
ProductVersion:	11.0
BuildVersion:	20A5323l
~                                                                              
▶ export SYSTEM_VERSION_COMPAT=1
~                                                                              
▶ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.16
BuildVersion:	20A5323l

Used solution from billxiong and MiracleMan, it works.

Thanks guys!