Mac os option key boot

Target Disk Mode is a great way to retrieve your files from your Mac if your machine refuses to boot properly. Follow our guide on Target Disk Mode for more information on how it works. OS X includes a boot option called Safe Mode.

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Start up your machine while holding down the Shift key to have OS X only load required kernel extensions and login items. It will disable all non system fonts, all startup items, and login items. If you are having OS X boot problems, always try this first to check and see if you have a rogue piece of software preventing your Mac from booting properly.

Starting Your Mac with Boot Option Keys

Check out this article for more information about booting into Safe Mode. Using this key combination will cause your Mac to become very verbose on startup and will show a terminal-like interface while booting. It will contain information important to startup, allowing you to diagnose startup problems by seeing any errors that may be occurring during startup. Verbose mode exits automatically when the computer's startup process progresses sufficiently and the blue screen appears.

This is a terminal interface that allows you to login and interact with your computer via text input only.

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No graphical interface will be loaded. This mode is good for when you need to troubleshoot a startup issue, or modify a file or application that is preventing proper startup. In this mode, you can use Safari to browse the web for any possible boot problem solutions, perform a system restore, or format the drive using Disk Utility. For more information about using Lion's Recovery Mode features, check out this previous article.

15 Startup Key Combinations for Mac

Cory Bohon is a freelance technology writer, indie Mac and iOS developer, and amateur photographer. Follow this article's author, Cory Bohon on Twitter. Press Option During Startup Holding down the Option key during startup will show you a boot screen with all bootable devices listed. By starting a Mac in Target Disk mode, you can connect it to another Mac and copy files to and from the drives.

In essence, it turns your Mac into a hard drive enclosure. Apple states you can use:.


Here's everything you need to know about your MacBook ports. Single User mode boots your Mac into a minimal text-based environment with no GUI, and no drive volumes mounted on startup. This mode allows you to fix problems with a Mac that refuses to start. The clue here is in the name. Instead, Verbose mode is perfect for those instances when your Mac hangs on boot.

19 useful Mac startup key combinations you should familiarize yourself with

You can see exactly what is interrupting the boot process, and hopefully take steps to remedy it. For example, many boot problems are related to third-party kernel extensions. Verbose mode may highlight the problem extension, allowing you to reboot in Safe mode, remove the offending item, then boot as normal and try again. Is your Mac old enough to have an optical drive? Holding C while your computer boots forces macOS to ignore your startup volume in favor of bootable optical media instead.


Trying to boot from the wrong optical volume? This allows companies to customize macOS to their liking and create custom images for specific users, then deploy it network-wide without modifying every machine. If you have set your Mac to login automatically, you can tell it to ignore this setting by holding Left Shift after the boot screen a white Apple logo and progress bar appears.

Want to stop all your login items and previous session windows from opening on launch? When you get to the login screen, enter your password as normal then click on the Log In button or hit Enter. Immediately press and hold the Shift key while your Mac logs in and boots up. Read More , and we recommend that you learn them now so you can rely on them when you really need them. Explore more about: Your email address will not be published.

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