What one might observe in these instances is something along these lines. We normally expect to see at least the TGT when we issue the klist command via Terminal utility. Note how second time command is run, which happened after the ticket expired, there is no result from the klist command.
At times one might observe that there is a ticket, but it is expired and does not renew. Do not always assume that having a ticket means everything is normal, and be sure to confirm that the expiry stamp is later than current time.
lab:~ labusr$ klist Credentials cache: API:3C31635C-78FB-41EA-AB31-9957F0E0F02A Principal: labusr@RACKTOPLABS.COM Issued Expires Principal May 9 08:17:09 2016 May 9 18:17:06 2016 krbtgt/RACKTOPLABS.COM@RACKTOPLABS.COM May 9 08:17:42 2016 May 9 18:17:06 2016 cifs/bsr-3572c1aa.racktoplabs.com@RACKTOPLABS.COM ### Same command issued again, moments later, and nothing listed for user. ### lab:~ labusr$ klist klist: krb5_cc_get_principal: No credentials cache file found
Open Terminal and use the kinit command. This will prompt you for your user password, then use this credential to request a new TGT. Once TGT is re-acquired, user should no longer be prompted for their password, at least not until TGT expires again.
It is possible to achieve same result as the first method describes via a Ticket Viewer utility, which we can start from Terminal by running this command: /System/Library/CoreServices/Ticket\ Viewer.app/Contents/MacOS/Ticket\ Viewer & . Alternatively, we can use Finder's Goto Folder method and locate the Ticket Viewer utility by navigating to /System/Library/CoreServices .
This may be a more user-friendly alternative which eliminates need for former methods, but does require that a computer have a password-protected screensaver, or login prompt is forced after display wakes-up from sleep. In System Preferences -> Security & Privacy -> General, set the option Require password after sleep or screen saver begins to immediately. When you wake your computer from sleep, activate the screen saver with a hot corner, or return to the computer after the screen saver has activated, the system will prompt you for your credentials. Once you authenticate, the system will use the credentials to renew your TGT if it recently expired.