Symptom
After installing Security Update 10-19-01 on an affected computer, the Classic environment stops starting up almost immediately after being opened. A white or gray Classic startup window appears (Figure 1).
Figure 1 A gray Classic startup window
Note: This occurs when no external display is connected to the computer. This could potentially affect any Mac OS X-compatible computer that is operating with a secondary or tertiary video card that does not have a monitor connected to it. This issue primarily affects PowerBook computers with built-in VGA ports, but certain iBook models that include external video ports could display this symptom.
Solution
Update to Mac OS X version 10.1.1 or later. For more information, see technical document 106634: "Mac OS X Update 10.1.2: Enhancement and Installation Information"
After installing Security Update 10-19-01 on an affected computer, the Classic environment stops starting up almost immediately after being opened. A white or gray Classic startup window appears (Figure 1).
Figure 1 A gray Classic startup window
Note: This occurs when no external display is connected to the computer. This could potentially affect any Mac OS X-compatible computer that is operating with a secondary or tertiary video card that does not have a monitor connected to it. This issue primarily affects PowerBook computers with built-in VGA ports, but certain iBook models that include external video ports could display this symptom.
Solution
Update to Mac OS X version 10.1.1 or later. For more information, see technical document 106634: "Mac OS X Update 10.1.2: Enhancement and Installation Information"