Discover how to clean install macOS Big Sur on your MacBook from a Bootable USB Drive.Part 1 – Flash Drive on Amazon 2 – Bootabl. This comprehensive guide on how to clean install macOS covers the entire process step by step.
To actually boot a Mac from an external USB drive, your startup security settings need to be updated. Performing a clean install from a bootable USB flash drive isn't as straightforward as using the installer to start a Mac from an external drive. But if the hard drive cable is bad then it won't install so try the above first. There are ways to get a Mac installer onto a USB using a PC, you need to Google it for guides. Cheap fix, new cables are less than $50 on eBay or Amazon.
If it boots normally then the hard drive cable inside is bad. How would I run a live Mac OS from a USB without. Once the app opens, make sure that it is selected in the left section, and hit the Erase button up top. Step 2: Connect the aforementioned USB flash drive to your Mac, and then launch the Disk Utility app to format the connected flash drive. The app will be titled, "Install macOS High Sierra". Now, near the center of the window, select the Format drop-down list and select "Mac OS X Extended (Journaled)" as the type. Next, to the First Aid button at the top, click the Erase button. In the window, at the top of the left bar, select your Mac's Main Drive. Installing a Mac operating system in this way can be challenging, as the whole process is involved with the application of Terminal command lines and creating a bootable installer. Some Basics of macOS install from a bootable USB Drive. In this regard, you need to install macOS from an external drive or USB. How to create a bootable macOS Catalina installer drive. Choose your USB flash drive and let Disk Drill make it bootable for you. Choose the macOS Monterey installer file by clicking the Add macOS installer button and choosing the Locate installer on disk option. Launch Disk Drill from Applications and select the macOS Installer option from the left pane. Connect a suitable USB flash drive to your Mac. You can do this by double-clicking the device's name on the desktop and then typing a new name. Give the flash drive an appropriate name. Follow these steps to create a bootable USB installer of El Capitan in Terminal. Use Terminal to Create the El Capitan Bootable USB Installer. Creating a Bootable Flash Drive With OS X Lion – Lifewire. This is important, as using the wrong name could lead to another connected drive. Connect the external drive to your Mac, and make a note of the external drive's name as it appears within macOS. Alternatively, you can just hold down the C key while starting up to boot directly into the USB drive. Wait until the Startup Manager pops up, then select the "OS X Base System" volume. To install El Capitan, make sure the USB drive is inserted into the computer, then restart the computer while holding the Option (alt) key on your keyboard. How to Make a Bootable OS X 10.8 Mountain Lion USB Install. Click on "Select target" to choose your Pen Drive/SD Card.
Navigate to the OS image file and select it. It breaks the entire complicated process of flashing an OS image file into three straight-forward steps: Select Image > Select Drive > Flash Image. From the boot menu, select the USB drive and hit enter. It can be different depending on your computer’s model. Start the computer and press the boot key like F10, F12, etc.
Connect it to the computer on which you want to install MacOS. Close Etcher and eject your USB drive or SD card. Once it is done, you will see a “Flash complete” message. In the new command line window that opens, to determine the USB flash drive number or drive letter, at the command prompt, type list disk, and then click ENTER. Open a Command Prompt window as an administrator. Insert a USB flash drive into a running computer. How to install macOS or OS X on a new hard drive for your Mac.
How to Make a Bootable OS X 10.8 Mountain Lion USB Install.How to install macOS or OS X on a new hard drive for your Mac.