Jun 09, 2020 6. Boot Mac from USB. Follow the below process to boot your Mac from bootable USB: Insert the bootable USB installer drive and go to “Apple Menu Restart”. When your Mac restarts, press and hold the Option key till “Startup Manager” opens. The Startup Manager scans and lists the drives that are connected and bootable. Jun 22, 2013 This option on boot trick works for quite literally any boot volume, whether it’s an external USB drive of any sort, a Thunderbolt hard drive, boot DVD, CD, the Recovery partition, even in dual-boot environments with other versions of OS X, or a Linux or a Windows partition with Boot Camp, if it’s bootable and connected to the Mac it will be visible at this boot manager. Apr 01, 2020 Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes. If your Mac is using a firmware password, you're prompted to enter the password. Option-Command-P-R: Reset NVRAM or PRAM. If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery. For systems configured with OS X 10.7, 10.8, or 10.9, you can boot directly to the recovery drive by holding Command-R. Additionally, most systems shipped after 2010 support Internet Recovery. Restart your Mac, and hold down the Option key until icons for each operating system appear onscreen. Highlight Windows or Macintosh HD, and click the arrow to launch the operating system of choice for this session. If you want OS X or Windows to boot every time, choose app → System Preferences, click Startup Disk, and choose the OS you want. In this article we'll run through the steps necessary to create a bootable installer of the Mac operating system, whether it's so you can install the latest version of the macOS on multiple Macs.
There are various ways to boot macOS. Aside from using the built-in Startup Manager, you can also boot into Verbose, Safe, and Target Disk modes. In addition to this, macOS users also have an option of picking a disk to boot the operating system from. But let’s delve into something more specific. You’re about to find out how to boot your Mac up directly from external storage, specifically flash storage or a USB-based flash drive. Learn how to create bootable flash drive for Windows 10.
Why You Need to Boot from External Drive?
There are many occasions you may have trouble with your Mac.
Let’s begin with the obvious question here; what are the basic requirements for creating bootable USB for Mac?
How to Create Bootable USB Drive for Mac?
If you are not able to login to your Mac, you need to use Time Machine backup disk. Otherwise you should have another Mac for creating a bootable USB.
1. USB Drive
The macOS installer file is large with approximate size of 6 to 10GB depending upon the version. Also the process needs to sufficient storage space on your USB. So ensure to have at least 32GB or greater storage space on your USB drive.
Remember to copy and backup the USB since you need to delete the entire content for creating the bootable drive.
2. An Intel Based Mac
Apple transitioned to an Intel processors in 2005. In other words, if your Mac is not older than 2005, you should be fine.
3. Format USB Flash Drive to Apple File System
First, plug in your USB drive. Press “Command +Spacebar” to access Spotlight, then type “Disk Utility”. You can view the current file system of the USB drive. In our example, we have FAT32 file system which is compatible on Windows. You need to erase and format the USB to be compatible with your Mac.
Click on the “Erase” button on “Disk Utility” and choose the format as either APFS or Mac OS Extended. In most cases, your Mac will show the supported format by default and you don’t need to change it. On older Mac, you will see an additional scheme option, choose “GUID Partition Map”. Click on “Erase” button to continue further.
Disk Utility will delete all content on the USB and format it in the selected APFS or Mac OS Extended format.
4. MacOS Installer File
In order to create a bootable USB drive for Mac, you need download Mac OS installer. Open App Store on your Mac and search for the latest macOS version. Remember, App Store will only have the latest version which is macOS Mojave at this point when we write this article. Search for “macOS mojave” and click on the “Get” button.
This will start downloading the installer file to your “Applications” folder.
5. Creating USB Installer
After downloading, the installer will automatically ask you to install macOS Mojave. Simply quit the installer without starting the installation.
Boot Mac Os On Windows
Ready to start.
To continue we need to erase the volume at /Volumes/Boot Disk.
If you wish to continue type (Y) then press return:
Note that Apple discourages booting with an earlier macOS version than the version your device is shipped with.
6. Boot Mac from USBMac Os X Choose Boot Drive Mac
Follow the below process to boot your Mac from bootable USB:
Mac Os X Choose Boot DriverWrapping UpMac Os X Boot Disk
As simple as the process seems, it tells you a lot about your system. For example, if a USB flash drive that contains a bootable copy of macOS doesn’t show up on the Startup manager, you may need to repair the disk permission. Also, remember to format the USB drive with a APFS or Mac OS Extended format.
Mac Os X Choose Boot Drive Windows 10
That said, now you know how to boot up another version of or a copy of macOS and troubleshoot possible issues with your device.
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