Ninja Stik. How to choose a startup disk on your Mac to boot from USB You set your Mac or Macbook which disk to start up from when more than one startup disk is connected. Set the default startup disk You can change the startup disk your Mac automatically uses from System Preferences.
How to Use OS X Boot Options to Troubleshoot Your Mac
From the Apple menu choose System Preferences. Select your startup disk from the list of available volumes. Temporarily change your startup disk with Startup Manager Startup Manager allows you to pick a volume to start from while the computer is starting up. Immediately press and hold the Option key.
- Boot a Mac from a CD / DVD.
- Use Startup Disk preferences.
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After a few seconds, the Startup Manager appears. Exceptional ease of use Intuitive and efficient handling through our user-friendly interface. High performance Get high performance and minimal system overhead.
Download the Recovery Media Builder. Read the Announcement on the Welcome page and click the "Continue" button. Select the device to create a bootable media USB flash media or an external hard drive. The operation completed successfully. Using this key combination will cause your Mac to become very verbose on startup and will show a terminal-like interface while booting.
Older OS Version
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.
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.
How to choose a startup disk on your Mac to boot from USB – NinjaStik
For more information about using Lion's Recovery Mode features, check out this previous article. Cory Bohon is a freelance technology writer, indie Mac and iOS developer, and amateur photographer.
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Follow this article's author, Cory Bohon on Twitter. Future University. Press Option During Startup Holding down the Option key during startup will show you a boot screen with all bootable devices listed.