These include things like cooling fan speeds, power, display management, port illumination, and more. There are many things you should try before resetting the SMC , but if you're at the end of your rope, then reset it. Note: If the battery in your MacBook is removable older MacBooks , then just take it out, press the power button for 5 seconds, and put the battery back in and turn it on again.
Updated December These are still all the keyboard shortcuts to use when starting up your Mac. We may earn a commission for purchases using our links. Learn more. What would it be like if a dog manned the International Space Station? If you plan on doing any gaming on your Mac mini, you're going to want some great gaming accessories to make sure you're getting the best experience. Mick is a staff writer who's as frugal as they come, so he always does extensive research much to the exhaustion of his wife before making a purchase.
If it's not worth the price, Mick ain't buying. Skip to main content. Black Friday at Dell: Check out the best deals now! Forums Shop Toggle Search. Here are all the keyboard shortcuts you can use when starting up your Mac! Here's what it does according to Apple : Verifies startup disk and tries to repair directory issues if needed Loads only required kernel extensions Prevents Startup Items and Login items from opening automatically Disables user-installed fonts Deletes font caches, kernel cache, and other system cache files How to start in Safe Mode Start or restart your Mac and immediately press and hold shift on your keyboard.
Release the shift key when you see the login window. You can leave safe mode by restarting your Mac without pressing any keys during startup. Startup Manager: option alt The Startup Manager lets you choose a different startup disk during boot. How to start the Startup Manager Start or restart your Mac and immediately press and hold the option key on your keyboard.
Release the option key when you see the Startup Manager window. Select a startup disk. Click the arrow or press return on your keyboard. How to start up from an available external disk Start or restart your Mac and immediately press and hold the C key on your keyboard. Release the C key when you see the Startup Manager window.
Release the D key when you see the choices appear. You can also hold option-D to start up from either utility over the internet. Start up from a NetBoot server: N Booting from a NetBoot server allows you to boot from a network, rather than a local hard disk or optical disk drive. How to start up from a NetBoot server Start or restart your Mac and immediately press and hold the N key on your keyboard. Release the N key when you see the choices appear.
Select a network. If you're having an inexplicable issue with your Mac, this is a good place to start. You'll probably have to use both hands. Release the keys after about 20 seconds.
Use Startup Disk preferences
If you have a Mac that plays a startup chime, you can release the keys after you heard it a second time. If any of that is the case, then here's what to do: How to boot up your Mac in Recovery Mode Start up or restart your Mac and immediately press and hold command-R on your keyboard. Release the keys when you see the Apple logo or a spinning globe. Click an option.
Click Continue. Start up in single-user mode: command-S If you're comfortable with UNIX, sometimes you may want to boot your Mac in single-user mode, which lets you try and isolate startup-related issues.
How to boot up in single-user mode Start or restart your Mac and immediately press and hold command-S on your keyboard. Release the keys when you see white text on the screen. How to start up in target disk mode Start or restart your Mac and immediately press and hold T on your keyboard. Release T after about 20 seconds. Start up from the macOS startup disk when other disks are available: X If your Mac would normally start up from a non-macOS startup disk, like a Windows partition, then you can hit X to start from the macOS startup disk.
How to start up from the macOS startup disk when your Mac would otherwise start from a non-macOS startup disk Start or restart your Mac and immediately press and hold X on your keyboard. Release when you see the Apple logo. In the sub-dialog that appears, you can specify a startup key and check the checkbox to make it effective. On stock older Macs, holding down Option does nothing at startup by default, although some extensions may deactivate if Option is held down when they attempt to load; see below for Option's effect on new Macs and Macs with Zip drives.
Although Control is the default, you can redefine it in the Location Manager's Preferences dialog, and since Control held down at startup also activates Apple's MacsBug debugger see below , you may wish to pick a different key combination. Not surprisingly, many of the startup modifiers affect the disk used to boot the Mac.
Booting from USB Media: A Comprehensive Overview
A number of these are specific to certain models of the Macintosh. The Startup Manager displays a rather cryptic set of icons indicating available startup volumes, including any NetBoot volumes that are available. On some Macs with Iomega Zip drives, holding down Option at startup when there is a Zip startup disk inserted will cause the Mac to boot from the Zip disk. This is also useful if your main hard disk is having problems and you need to start up from another device.
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On some PowerBooks, however, this key combination merely ignores the internal drive, which isn't as useful. Only programmers and the most geeky of users will find these startup modifiers useful. If you rely on this frequently, you may want to redefine the default key for selecting the Location Manager location at startup from Control to something else. Open Firmware is a cross-platform firmware standard for controlling hardware that all PCI-based Macs use.
How to Make Your Mac Boot From a USB Drive
It's mostly of interest to hardware developers, but it can be a fun way to freak out a new user who's not expecting to see a command line on the Mac. To exit Open Firmware and continue booting, type "mac-boot" or "bye" depending on Macintosh model and press Return. Although Apple has moved away from relatively frivolous "Easter Eggs" connected with startup modifiers, there are a few available for old Macintosh models.
Bypass startup drive and boot from external or CD. Disable Extensions.