This will turn the computer back on and allow a different user to log in (as previously noted, in certain rooms that have a USB switcher in the AV rack, the light indicator for the Apple computer on the switcher will come back on, letting you know the computer is on and sending a signal). Step 3 - Release the Power button, then press the Power button again for about 2 seconds. Step 2 - Hold the Power button down for 8 - 10 seconds (in certain rooms that have a USB switcher in the AV rack, the light indicator for the Apple computer will turn off on the switcher, letting you know the computer is off and no longer sending a signal.) Step 1 - In the AV rack, locate the power button associated with the Apple computer. The only course of action you have in this situation is to force power-off the Apple computer and then restart the system. General Lab Use Working with Applications and Email Saving Files and User Settings Printing. This happens when the previous user has forgotten to log off the system, and the security features in MacOS require a password to continue after several minutes of inactivity. Mac OS X Workstations in Unity Computer Labs. A common issue that can happen on a MacOS (Apple) classroom computer is that a new user can not log into the system, as they are presented with a different user's login screen asking for a password.
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