While it should not cause the kernel to load is Safe Mode, odd problems can arise from faults in the disk format and partition scheme, and it's a simple task to open Disk Utility and check the disk for errors. If the problem goes away then you can try resetting your various USB devices. While unlikely, it is possible that conflicts or faults with multiple USB devices might result in the system reading a Shift key press at boot, so if you have multiple USB devices connected to your system, then try removing them and allowing the system to boot with only the keyboard connected. You can also open Apple's keyboard viewer window to see whether the Shift key is registering randomly, or if it is sensitive to slight pressures. To test this you can try a different keyboard (any USB keyboard will work), or try connecting your current one to a different USB port. Since pressing the Shift key on the keyboard at boot is generally how you get to Safe Mode, if the keyboard is broken and is intermittently sending the Shift key press to the system then this can also cause the system to inadvertently boot to Safe Mode.
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To clear this issue, you can either reset the PRAM by restarting with the Option-Command-P-R keys held down, and hold them down until the system automatically resets and sounds the boot chimes again, or you can enter the following command in the Terminal: These arguments can include options that make the system always boot to alternate modes such as Verbose mode, Single-User mode, and Safe Mode, so if the system is interpreting a value stored in the "boot-args" setting as a command to load in Safe Mode, then the system will always do this.
![apple mac restart safe mode apple mac restart safe mode](https://cdn.wccftech.com/wp-content/uploads/2016/04/Mac-Safe-Mode.png)
In OS X, the PRAM is a small chunk of memory that holds hardware-based variables the system can use before the OS is loaded, including sound volumes, some display settings, the startup disk preferences, and a variable called "boot-args," which, as its name suggests, contains boot arguments that are passed to the operating system when the kernel loads. If this happens, there are several approaches you can take to tackle the problem. To get to Safe Mode, you simply hold the Shift key down at startup however, there are times when systems might appear to be stuck in Safe Mode and always boot to it, regardless of whether you command it to do so.
#Apple mac restart safe mode Bluetooth#
Apple's Safe Mode option will boot OS X to a minimal environment where only a basic set of kernel extensions are loaded, disabling unnecessary services like Bluetooth and support for third-party add-ons that might be causing problems for your system.