Apple Remote Desktop - updated and no more screen sharing

I just took two laboratories of the iMac, 1 vote against and 34 2011 iMacs and the other with 34 2012 iMacs.  I installed ARD on a mini and liked power control and push packages units.  I updated all the iMacs 10.11.3 (15 d 21) and I am unable to screen share at all.  I can still push software, pull information but I can't connect to the computer.  I did some research and noticed that this could be a firewall issue.  Both my mac mini and the iMac have their firewall disabled.  I thought that perhaps it would be the mac mini but a single iMac is not respected and she 10.9 and I can't connect to it very well.

I wonder if it could be a conflict with our laboratory software, LanSchool Lite.  I'm having trouble making fully deployed in each laboratory, and I wonder if she does something different in 10.11 vs 10.9 which would explain the screen share no longer works.  The only other software that we have are Sophos AV and Chrome.

Any ideas would be welcome as im scratching my head on this one.

Thank you

Don.

Remove Sophos, delete LanSchool Lite and try again.   When things go weird, always remove antivirus and anti-malware (as a test, at least).  Or install 10.11 on a scratch Mac without these packages and see if you can connect.

Tags: Servers and Enterprise Software

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