Parallels 20 breaks Shared Folders in macOS VMs

Discussion in 'macOS Virtual Machine' started by xmd, Sep 26, 2024.

  1. xmd

    xmd Member

    Messages:
    21
    See also Shared Folders not showing up


    I just upgraded to Parallels 20.0.1 on my Intel mac (macOS 14.7) and now my shared folders aren't working on my macOS VMs either. Windows VMs: Shared folders working normally.
    Steps I took:
    * On the host mac: I tried removing then re-adding "Documents folder" permissions for Parallels Desktop from System Settings / Privacy and Security / Files and Folders: No change.
    * on the mac VMs: Reinstalling Parallels Tools on the VM and rebooting multiple times: No change.
    * On the host mac: I tried adding "Full Disk Access" permissions for Parallels Desktop from System Settings / Privacy and Security pane. No change.

    This is clearly a Parallels bug, and a serious one - without Shared Folders my workflow is dead.
     
  2. xmd

    xmd Member

    Messages:
    21
    Here is the error screen I'm seeing. Of note, this macOS VM is running 10.14.6.

    upload_2024-9-26_10-20-19.png
     
  3. xmd

    xmd Member

    Messages:
    21
    I was able to restore Shared Folder by reverting to Parallels Desktop 19.4.1:
    * on Host mac, use Time Machine backup to restore Parallels 19.4.1
    * restart host mac
    * launch parallels, give permission for extension
    * restart again
    * open the macOS VM
    * From host, use Actions menu, choose "Reinstall Parallels Tools"
    * restart the VM

    After this, I'm back to functional Shared Folders again.
     
  4. RichardM36

    RichardM36

    Messages:
    1
    I am having a similar issue after upgrading to Parallels Desktop Pro 20. In my case it is Ubuntu Linux VMs that have lost write access to shared folders located on my Mac's internal hard drive. The attached USB 3 SSD drive, which I have also shared via PSF has not been affected. That disk has an exFAT filesystem as opposed to the APFS formatted internal drive for what it's worth but I have no idea if that's relevant to this issue.

    I noticed that the group membership of the shared folders that have become Read-Only when viewed from Linux is "nogroup" whereas the folder upon which the shared external drive is mounted is my user account group. I am unable to change this with sudo chgrp on the linux side and giving "everyone" Read/Write on the Mac side changes nothing. It is rather annoying but not so much that I'm willing to go through the downgrade process. Sigh.
     

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