Unable to register Parallels Desktop with error 'check your Internet connection'

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Symptoms

There is no possibility to register a copy of Parallels Desktop, Parallels Access or Parallels Toolbox, a message say to check your Internet connection. Even though the Internet is working fine, registration is still not working.

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Cause

Resolution

In order to resolve the issue follow the steps below:

  1. Temporarily disable firewall/antivirus application installed on the Mac according to its manufacturer instructions. It's strongly advised to restart the Mac to apply changes. If disabling firewall/antivirus won't help, temporarily remove the application.
    NOTE: Add Parallels Desktop application to firewall/antivirus exclusions so the issue won't happen again in the future. 

  2. If you have proxy turned on in your Mac - please turn it off at:

    For proxy settings:

    1) Please contact you system administrator for assistance.

    2) Disable proxy in System Preferences - Network - Active connection - Advanced... - Proxy

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    And restart your Mac.

  3. Open Applications -> Utilities -> Terminal and paste the command below as is and hit Return:

    cat /etc/hosts
    
  4. Examine the output for similar entries:

    127.0.0.1       pdfm.blist.parallels.com
    127.0.0.1       pdfm.vl.parallels.com
    127.0.0.1       registration.parallels.com
    127.0.0.1       update.parallels.com
    
  5. In case such entries are present in your hosts file, remove them. To do it:

    In Terminal execute another command (copy and paste it into Terminal as is.):

    sudo perl -pi -w -e 's/(?:[A-Za-z0-9-]+.?)*parallels\.com/#/g;' /etc/hosts
    

    NOTE: You will need to enter your Mac password to run the command. No symbols will be shown due to security measures, so just hit the keys and use Return/Enter.

  6. Close Terminal window and try registering Parallels Desktop again.

To check status of 443 port, do the following:

  1. Open Spotlight > type Network Utility > open Network Utility.app
  2. Switch to 'Port Scan' tab > enter the address:

    registration.parallels.com
    
  3. Enable 'Only test ports between' option > enter ports 443 and 443 and click Scan:

  4. If the port is opened, the output will be:

    Open TCP Port:  443    https
    
  5. If this message does not appear, please do the following:

    a. Reconfigure network settings/contact IT administrator.

    b. Use different type of connection (e.g. a mobile device as a hot spot).

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