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User profile for user: BurgerThon
BurgerThon Author
User level: Level 1
4 points

Screen sharing doesn't work at startup

After startup, the Screen sharing doesn't work. The host doesn't appears in Finder/Network.


We first must to locally login to see this host.


First settings :

  • Security & Privacy / Firewall / Firewall on
    • options :
      • [ ] automatically allow integrated softwares to receive inbound connections (translated from french)
      • [ ] automatically allow signed downloaded softwares to receive inbound connections
      • [X] enable stealth mode
  • Sharing / Screen sharing
    • kdc : denied
    • netbiosd : allowed
    • remotepairingdeviced : denied
    • screensharingd : allowed



Many attempts :

  1. Disable stealth mode
  2. First point + Firewall options : allowed all inbound connections for Screen sharing (kdc, remotepairingdeviced)
  3. Firewall disabled
  4. as viewed on internet :
    1. disable and re-enable Screen sharing
    2. on host : disconnect remote user


Context :

  • MP6,1
  • From : Mojave 6 and Catalina 7, up-to-date
  • To : Monterey 3, up-to-date
  • over same VLAN
  • internet denied (Apple's OCSP and other apps exceptions)
  • Filevault enabled


How to enable screensharing at startup ?


Thanks.

Posted on Mar 24, 2022 10:01 AM

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User profile for user: James Brickley
James Brickley
User level: Level 5
4,636 points

Posted on Mar 27, 2022 8:34 AM

FileVault being enabled means it boots to a pre-boot login screen that is offline with the network. The operating system is not loaded despite it looks exactly like a normal login screen. It's a minimalistic login that is graphically pretty. When you login at this pre-boot authentication screen then you will see a progress bar, that is the Mac booting. Once booted you can logout and the Mac will remain online. But if the Mac is rebooted, shutdown, or power is interrupted the Mac will return to the pre-boot authentication screen and it may even go to sleep if you don't login. The pre-boot authentication screen unlocks the encrypted disk and boots the operating system.


You should put the Mac Pro 2013 in a secure location such as a locked room or data comms closet in a secure building. Then cable lock it to a shelf, etc. Turn off FileVault. Adjust the power options with the Terminal pmset command to disable sleep, hibernation, power-nap, enable Wake-On-Lan, enable boot after power loss. Also install a UPS backup battery.

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User profile for user: James Brickley
James Brickley
User level: Level 5
4,636 points

Mar 27, 2022 8:34 AM in response to BurgerThon

FileVault being enabled means it boots to a pre-boot login screen that is offline with the network. The operating system is not loaded despite it looks exactly like a normal login screen. It's a minimalistic login that is graphically pretty. When you login at this pre-boot authentication screen then you will see a progress bar, that is the Mac booting. Once booted you can logout and the Mac will remain online. But if the Mac is rebooted, shutdown, or power is interrupted the Mac will return to the pre-boot authentication screen and it may even go to sleep if you don't login. The pre-boot authentication screen unlocks the encrypted disk and boots the operating system.


You should put the Mac Pro 2013 in a secure location such as a locked room or data comms closet in a secure building. Then cable lock it to a shelf, etc. Turn off FileVault. Adjust the power options with the Terminal pmset command to disable sleep, hibernation, power-nap, enable Wake-On-Lan, enable boot after power loss. Also install a UPS backup battery.

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Screen sharing doesn't work at startup

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