As long as the Mac is compatible with the operating system contained on the selected drive, your Mac will continue booting the designated operating system.
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The Mac Startup Manager works great if you have a number of boot options from which to choose, but your Mac also recognizes a few additional startup keys that direct it to boot immediately from a specific source. Just as with its Windows counterpart, macOS Safe Mode should be used to help troubleshoot issues that may be caused by corrupt or incompatible software, or to help isolate software issues from hardware failures. To use it, press and hold the Shift key on your keyboard as soon as you see the Apple logo.
How to eject a CD on a MAC mini with PC keyboard and mouse
Keep holding Shift until you see a gray progress bar appear beneath the Apple boot logo. Keep holding the keys until your Mac reboots itself and you see the Apple logo appear and disappear a second time.
At this point, you can release the keys and your Mac should boot as normal. This shouldn't be much of an issue for Mac users, as the result will be the same. Who cares whether the ejection was performed because of a paper clip or the operating system sending an eject command? Turns out there's a big difference, If your Mac uses a slot-loading optical drive, such as those used on iMacs and MacBooks, your Mac only sends an eject command if it senses there's a CD or DVD in the optical drive.
If your Mac doesn't think there's anything in the drive, no eject signal is sent.
Eject stuck CD/DVDs even with no OS installed
CDs and DVDs can become stuck in your Mac's optical drive for many reasons, most of which seem to have to do with the phases of the moon. OK, there are actually real reasons why they get stuck ranging from dirt and debris in the drive or on the disc to using the incorrect media type in an optical drive. It's a recipe for stuck media. When media becomes stuck in your Mac, don't spend all evening howling about the problem; instead, try a nifty trick that usually will eject stuck media.
If you have a slot-loading Mac, including portables, Mac minis, and iMacs , you may find yourself unable to eject a stuck CD or DVD because your Mac has already unmounted the media. Once the media is unmounted, your Mac may not respond to the eject command because it believes there is nothing in the drive, and therefore, nothing to eject. There are various ways to force a media eject. This one, using the Boot Manager, is pretty simple and almost always works. All OldWorld systems have floppy drives, so use the floppy drive to launch the installer, and then point the installer to the CD for the needed files.
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- 7 Mac Startup Options Every OS X User Should Know.
Booting from an existing operating system is often a convenient option; for some systems it is the only supported method of installation. Double click the BootX application icon. This will give you the chance to select the ramdisk. You may need to select the No Video Driver checkbox, depending on your hardware.
Use the Mac's Boot Manager to Eject a Stuck CD/DVD
Then click the Linux button to shut down MacOS and launch the installer. You will have already placed the vmlinux , initrd. At the prompt, type. On some machines, you may need to use ide0: instead of hd:. In a few more seconds you will see a yaboot prompt. The Debian installation program should start.
How to choose a startup disk on your Mac to boot from USB
On a PReP machine, you should try. On some PReP systems e. Motorola PowerStack machines the command help boot may give a description of syntax and available options.
Booting from floppies is supported for PowerPC , although it is generally only applicable for OldWorld systems. NewWorld systems are not equipped with floppy drives, and attached USB floppy drives are not supported for booting.