I would like to boot from USB3 if possible. I am getting another 3 TB drive to mirror my 3 TB fusion drive so that I have a bootable copy of my current setup so if something goes wrong I can plug in and go. Release the key when the startup disk options show up. Turn on or reboot the Mac and immediately hold down one of the following shortcut keys: The Option / Alt key for an Intel-based Mac. it can’t boot since the OS was installed on the mini and not from the iMac. Boot your Mac from the bootable USB drive once Connect your USB drive to the target Mac machine that is connected to the internet. In Lion SharedSupport folder, copy and drag. Create volume name, choose Options > GUID > Apply. On the new mac there is no firewire so I had to hook it up with USB 2.Ģ. Format drive for Mac: In Disk Utility, go to Partition > Volume Scheme > 1 Partition. Select the volume containing the bootable installer. Release the Option key when you see a dark screen showing your bootable volumes. Unfortunately, even though it seems to be available in target disk mode, the system won’t boot. Press and hold the Option (Alt) key immediately after turning on or restarting the Mac.
How to boot to mac bootable disk install#
I did a nice clean install and didn’t bother to import my old settings, preferences, software.īut there are things I would like to do with my old lion drive. Recently, I got a new iMac with 3TB fusion drive. It was much faster than the 5400 speed 2.5″ internal drive in the mac mini. My old mac booted from a 1TB Newertech MiniStack via Firewire 800.
Your Mac will go back to booting to it’s primary startup disk next time you reboot. It won’t work for USB and FireWire drives, though.īooting to another volume using either of these methods is a one-time temporary change, so you don’t have to worry about altering any settings to reverse it. This will bypass the selection menu and immediately start from the disc. Rather than hold the Option key, you could instead just press & hold the C key if you’re booting from a CD or DVD disc. This is especially true of USB flash drives. The computer will start up from the chosen volume, but bear in mind performance will likely be much slower than when you normally operate your Mac. Use the keyboard arrows to choose your boot device, then press the Enter key. These commands assume that the installer is in your macOS Applications folder and that bootpartition is the name of the USB. Type or paste one of the following commands in the Terminal. Open the Applications > Utilities> Terminal app. Continuing to hold this button down will bring up a menu where you can select a disc or drive to boot from. Connect the USB flash drive or other volumes to be used to save the bootable installer. There easiest way to boot to any device other than a Mac’s internal hard drive is to press and hold the Option key immediately after hearing the Mac startup chime. Next, open the Mac Linux USB Loader application you downloaded. If it isn’t, delete the partition and create a FAT partition not an ExFAT partition. Check that the USB drive is formatted with an MS-DOS (FAT) partition. These are all potential reasons for booting to an external device, among many others. First, insert the USB drive into your Mac and open the Disk Utility application. Perhaps you’ve got a cloned backup of your entire Mac on an external hard drive and you want to make sure it’s bootable. Or maybe you’re trying to boot from a USB flash drive that has a clean install of OS X on it for troubleshooting purposes.
How to boot to mac bootable disk mac os x#
Let’s say you need to use the Mac OS X installation disc that came with your computer to reformat the hard drive and put it back to factory settings. Apple made it easy so all you need to know is just a simple keyboard command. At some point, you may find a need to boot your Mac from a disc or a drive other than the primary Mac OS X startup volume.
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