- C boot up mac from usb mac os x#
- C boot up mac from usb install#
- C boot up mac from usb windows 10#
- C boot up mac from usb pro#
- C boot up mac from usb windows 7#
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. Continuing to hold this button down will bring up a menu where you can select a disc or drive to boot from. 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.
These are all potential reasons for booting to an external device, among many others.
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.
C boot up mac from usb install#
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.
C boot up mac from usb 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. There is no way to select the boot drive.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. In other words, when specifying the the legacy boot option, the firmware tries to BIOS boot. I believe the -device /dev/disk3s1 is a dummy option which is ignored. sudo bless -device /dev/disk3s1 -setBoot -legacy Your question included the command which is repeated below. Windows on the USB drive may be detected and included in a Windows boot manager.Ī final note. Since you have Windows already installed on the internal drive, try rebuilding the BCD on the internal drive. You would have to try this on your Mac to see if it would work.Īnother option would be the following. I have never tested such an arrangement to see if it would work with any Mac model. The System and Windows partitions are described in the Microsoft document BIOS/MBR-based hard drive partitions. One possible way to come close to having Windows on an USB drive would be to put the System partition on the internal drive and Windows partition on the USB drive. For example, see the question Bootcamp “Missing Operating System” on external drive.
C boot up mac from usb pro#
However, some (if not all) of the very next year MacBook Pro models can BIOS boot from USB. So your model probably can not BIOS boot from USB. In 2015, Apple started to eliminate the ability to BIOS boot entirely, which effectively ended the ability to install Windows 7. This continued through at least the 2014 model year.
C boot up mac from usb windows 7#
However, since Windows 7 required a BIOS boot, Apple started adding the ability to BIOS boot from USB. This is also the time Apple starting to eliminate the optical drives from Mac models. Apple did not catch up until around 2012/2013. The industry switched to EFI booting of Windows in 2011. Your Mac is probably just a year to early. UPD: I've noticed that my USB drive is detected as internal, that's not true. Here's my partition table: /dev/disk0 (internal, physical):ģ: Microsoft Basic Data BOOTCAMP 119.9 GB disk0s3Ģ: Apple_APFS Container disk2 127.8 GB disk1s2Ġ: APFS Container Scheme - +127.8 GB disk2ġ: APFS Volume w32u SSD - Data 11.0 GB disk2s1Ġ: FDisk_partition_scheme *125.1 GB disk3Ĭan I actually boot from USB with the MBR bootloader on Mac or not? I've tried any way, including rEFInd, but it results again in booting to Win10 installed on disk0 HDD.
C boot up mac from usb windows 10#
It doesn't work – it just boots to Windows 10 installed on the internal HDD with legacy method + Hybrid MBR too. When I'm trying to boot from the USB with the command (I've unmounted the disk before): sudo bless -device /dev/disk3s1 -setBoot -legacy For experimental purposes I've installed Windows 7 to USB (it's NOT an installer, a real OS on USB) via WinNTSetup on other PC.
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