With a bootable Ubuntu USB stick, you can:
Choose Show All Devices from the options. Now you will see the external root drive in addition to the volume below it. Select the root drive in the sidebar (the next step won't work if you only. Next is setting the USB pen drive for creating the bootable installer. Choose the third option ' An 8 GB USB Thumb drive.' The app will list all drives in your system. Pick the one you would like use as macOS USB installer.
- Install or upgrade Ubuntu, even on a Mac
- Test out the Ubuntu desktop experience without touching your PC configuration
- Boot into Ubuntu on a borrowed machine or from an internet cafe
- Use tools installed by default on the USB stick to repair or fix a broken configuration
Creating a bootable USB stick is very simple, especially if you're going to use the USB stick with a generic Windows or Linux PC. We're going to cover the process in the next few steps.
Apple hardware considerations
There are a few additional considerations when booting the USB stick on Apple hardware. This is because Apple's ‘Startup Manager', summoned by holding the Option/alt (⌥) key when booting, won't detect the USB stick without a specific partition table and layout. We'll cover this in a later step.
Ever since the release of Mac OS Lion the software upgrades for Macintosh computers are distributed through the online app store. Be it a clean install or upgrade, mac app store require you connect to the internet to download whole installation files. The online OS update is okay if you have stable broadband connectivity and enough bandwidth. Apple also provides an option for internet recovery of macOS if your computer fails to boot. But there are situations where you can't download the OS from the Apple servers. Having a bootable macOS offline installation disk is the only solution in such scenarios.
How to make a macOS bootable USB installer
It is possible to create a backup macOS installer on a DVD or USB drive but later is the best choice. Mac and dev. Most of the Macs these days don't have DVD slots, and the installation through a disc is very slow. Hence we discuss only about making macOS recovery installer on a USB disc. For this you need a Mac and a USB pen drive of at least 8 GB space, and a third-party app called DiskMaker.
How To Make Bootable Usb Mac Os Mojave
- First, download a copy of Disk Maker from the official website.
- Choose a version as per your requirement. For example, if you want make USB installer for macOS Catalina 10.15, download Disk Maker X 9.
- I use an MacBook Pro with High Sierra. Hence, I'm downloading disk maker X 7.
- The next step is to download full macOS installer from the App Store to your Applications folder.
- Run Disk Maker DMG installer and copy the app to the Applications.
- The application will automatically detect the downloaded macOS as shown in the screenshot. Select 'Use this Copy' if you would like to proceed with it.
- Next is setting the USB pen drive for creating the bootable installer. Choose the third option ' An 8 GB USB Thumb drive.'
- The app will list all drives in your system. Pick the one you would like use as macOS USB installer.
- Ignore the warning message and proceed to Erase and Create macOS USB disk. Don't forget to provide your admin password when it prompts.
- Keep checking notifications tab for progress. When it completes you will find Install macOS Mojave (or High Sierra) mounted to your desktop as a USB disk.
- That's your backup. Unmount and keep the USB installer to a safe place.
What is the alternative if I don't have usable Mac at the moment?
This method is applicable when you have a Mac, and the internet recovery fails. But think about a situation when your only Mac stops to boot, and you don't have USB installer or TimeMachine backup! Downloading Mac OS DMG file might save you. If you have a macOS DMG, you can create bootable USB disk from a Windows PC — use a software like TransMac for this purpose.
Clean installing or restoring a Mac offline with USB pen drive
How to partition ssd mac. As said earlier, you could use the macOS USB installer to do a clean install or restore it upon a boot failure. Just connect the USB disk and press the Option/Alt Key when you hear the boot sound. The Mac will then display all the startup disks available.
Bootable Mac Usb Install
Pick the USB drive with the label 'Install macOS Mojave or High Sierra' and follow on-screen instructions to complete the installation. If you need, use the Disk Utility to format the drive for doing a clean install.
