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Therefore, you can try resetting the PRAM, which is used in part to store boot arguments the system will use. While unlikely, it may be possible stored settings in Apple's hardware could contribute to its inability to pass boot arguments to the operating system. Therefore, to enter Safe Mode on systems using a Bluetooth keyboard, press the Shift key immediately after hearing the boot chimes, and not before. The Bluetooth controllers in Apple's hardware will be properly initialized when the boot chimes sound, and not before, so if you hold any keys down before the chimes, then they will not be recognized by the system. While this will work for systems with USB keyboards, those with Bluetooth keyboards will fail every time. Often instructions to enter Safe Mode in OS X state to power up the system and immediately hold the Shift key. If you are unable to boot to Safe Mode, then in addition to trying the latest versions of OS X, you can also try several approaches:
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While perhaps a bug with specific system configurations, this and similar issues with booting to Safe Mode may arise from different issues, including irrecoverable faults in the filesystem formatting.
#Repair the volume boot os x in my passport ultra for mac? update#
Therefore, if you have not done so already, applying the update should be a quick fix. When attempting, the Safe Mode progress bar may display but will then disappear after about a third of the way (or halfway) to completion, followed by the system restarting and then booting normally.įor those affected by this issue, it appears a change Apple made in OS X 10.9.2 addresses this problem and allows affected systems to boot properly into Safe Mode.
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One of the minor but relatively long-standing bugs in OS X Mavericks has been an inability to boot to Safe Mode on some systems after upgrading.