Error when booting on an iMac

Question

Good afternoon, 
 We are experiencing the attached errors on boot up with an iMac. 
 Can you please advise? 
 Thanks and kind regards, Dan Petford

FormerMember · Accepted Answer

If the cert was expired - then the Windows machines would also fail to sync. The most likely issue is that it is a local cert. Macs require that the cert have a CA that is in their keychain - so the corporate ones like DigiCert and stuff. Go take a look at the ssl cert on the sgn server and see what the CA is. If it is a self-signed cert or the CA is the local AD - then the Macs won't trust it.

MichaelMcLannahan · Answer

Hello! 
 
 Is it just the one iMac? The issue is that the SSL cert on the server is either not configured properly (perhaps missing intermediate certs), or you've not added the local certs to the Mac and trusted them. 
 The Mac clients are much more fussy about SSL, so things need to be spot on on the server. If it's a public cert (and not an internal one) then it's a little easier, but it it's internal - best to install the cert into the Keychain on the Mac and "Always Trust" the cert.

Error when booting on an iMac

Top Replies