I have successfully created the USB installer stick. I have now tried booting my Mac 2,1, which is a late 2006 white Macbook. Mac 2,1 is listed as a supported device. Holding the Option key, I have a choice to boot from Mac HD or EFI Boot. The first message is Welcome to Grub. Set your bootable USB as your startup disk for the next boot in 'Apple Menu - System Preferences - Startup Disk,' then click 'Restart' to reboot your Mac. Your Mac will reboot from the USB instead of your default startup disk. Alternatively, you can also use the Startup Manager to select your boot drive when you start macOS. Whenever Apple releases a new version of macOS, I like to create a bootable USB installation drive. I test different Macs, and when I need to upgrade those machines, it's a lot more efficient to. The OS on my Mac recently stopped working and in order to fix the issue I needed to use a bootable USB drive to reinstall the OS. I'm going to take you thro. The entire process of setting your Mac to boot from USB should take around half an hour at most. Install it on a fast SSD and you've got a usable dual-boot system on your hands. Or you could install macOS on a flash drive, stick it in a drawer, and keep it for emergencies.
howdee - im a new user, but registered for just this one long/detailed comment/reply.0 - THANK YOU to all who came before on this hint/thread/comment. i am just standing on top of the giants before and adding my little comments for others.
1 - i could not make a windows-keyboard work. in particular, my imac (g5) would 'ask' about it when powering up by having me press the key 'just inside of shift key' on each side. thus, i was never able to make the keyboard-combo work correctly. if you cannot get into open-firmware, then try getting a normal MAC-keyboard.
2 - i was having all sorts of problems trying to get the correct device to use for the 'dir' command. Www casino games. i could see the tree of information, but could never make a working 'devalias' for myself. two clues:
3 - i was finally able to get things working better by doing/trying the following (details removed for hopeful-clarity):
Os x 10 13 3. 4 - once i got my magic incantation correct, it took prolly an hour to get thru the first-boot - but eventually i got the great happy-mac sound from the other room. hopefully you will be able to too. :)
Mac Usb Boot Stick
repeating: for me, the exact command i used was . gl & hth, h.Each operating system could crash at one time or another. Virtual machine software for mac. While it's safe to say that macOS is more stable than Windows, it can still be affected by issues that prevent your computer from booting up. In such cases, you might need to boot your Mac from a USB flash drive to fix the problem. This article shows you two ways to boot Mac from external USB stick, as well as some troubleshooting tips in case Mac won't boot from the target USB.
Boot Mac from USB Option l: Startup Manager
If your Mac won't boot up normally, you can set it to boot from a different drive, such as a USB stick containing macOS installation files in bootable format. The drive will have to contain a version of the OS that is compatible with the Mac. As long as you have the bootable installation USB, you can start your Mac from the USB by accessing the Startup Manager. Here are the steps to be followed:
Step 1: Insert the bootable USB into Mac and power it on.
Step 2: As soon as the startup process begins, hold down the Option (alt) key and keep it depressed until you see the Startup Manager on your screen. If there is a firmware password on your Mac, hold down the Option key until you're asked to enter that password.
Step 3: You will now see the various startup disk options, and your USB will be listed there. If you click on the Up arrow right below the icon for the USB, the computer will only startup once using this disk. If you press and hold down the Control key while making your selection, it will be saved, and your computer will boot from the USB every time, as long as it is left in the computer.
At this point, you can also use the Mac installation disk to boot your Mac from. It will appear as EFI Boot, and it works on all computers running macOS 10.9 or higher.
Boot Mac from USB Option 2: macOS Recovery Mode
As an alternative, you can start your Mac in Recovery Mode. This will allow the system to automatically detect and repair directory issues. Recovery Mode will only allow required kernel extensions to load, preventing login items and startup items to load automatically. It can also help you isolate the issue depending on whether or not the issue goes away in Recovery Mode. If the issues you have during normal startup don't show up in Recovery Mode, they are most likely fixed. That means you can reboot normally and your system should be back to normal.
Step 1: Start your Mac and hold down the Shift key. You will see the Apple logo on your screen.
Step 2: When you see the login screen, you can release the Shift key and login to your Mac.
Step 3: To check whether your Mac has booted into Recovery Mode, click on the Apple logo on the top left and then on About this Mac. In the window that opens, click on System Report… You should be able to see this:
How to Fix Mac Won't Boot from USB Drive
2011 Imac Boot From Usb
Sometimes Mac won't boot from USB as expected. If you are unable to select a different startup disk, it's possible that your disk is not showing up in Startup Manager. If you try Method 1 above but don't see your USB drive listed there, it could mean one of the following problems:
Compatibility: It is possible that the version of macOS or Mac OS X that you have on the USB drive is not compatible with the hardware. That means you won't be able to see it in the Startup Manager so, of course, you won't be able to boot from it. In such cases, you may need to burn a compatible macOS version on USB drive in order to be able to boot Mac from it.
Boot Mac From Usb Stick
Startup Security Utility: In certain cases where your Mac has the Apple T2 Security Chip (2018 and later devices), it may be your Startup Security Utility settings that are preventing you from booting from USB. In this situation, restart your Mac and hold down the Command + R keys when you see the Apple logo. This will put your Mac into Recovery mode. In macOS Utilities, go to Utilities >Startup Security Utility Mini browser open. and sign in as admin. Under External Boot, select the second option - Allow Booting from External Media.
Option ROM Firmware: Another known issue is that Option ROM firmware will not load in Startup Manager until you press certain keys manually. To do this, use Method 1 to access Startup Manager. Once you are there, press Option-Shift-Command-Period. You should now be able to see the USB drive. This is not exactly a problem as much as a feature. If the USB contains Option ROM firmware, you will need to press those keys everytime to boot from your pen drive.
How To Boot From Usb Mac
These two methods and the troubleshooting tips should allow you to boot from USB or in Recovery Mode so you can then isolate the problem that's preventing your Mac from booting up normally. Brave google chrome.
