If you plan on using the hard drive with a Mac booting from OS 9, or believe that this might be a possibility, then select the checkbox to install the Mac. Install Mac OS 9 Disk Driver There is an option to Install Mac OS 9 Disk Drivers. Select Mac OS Extended if you plan to use the drive as a media (capture scratch) drive.Step 4: Right-click on the drive and choose FormatAfter successfully created a macOS bootable USB, the next step is how to use it to install macOS from external USB drive. Step 3: Open Windows Explorer, click the Computer section in the sidebar and find your drive. Step 2: If you have already written any data to the drive, back it up before proceeding to the next step. 2, 2020Step 1: Plug your external hard drive into your computer. By Petty Madison | Last Updated: Jun.
![]() Format Hard Drive Mac OS X From AnWe will share detailed steps on how to install macOS/Mac OS X from an USB drive. On the bright side, you do end up with an untouched hard drive. Erase and Install: This option is the most taxing, time-consuming, and drastic of the three.This will bring up the Startup Manager on Mac.Step 4: You will see all bootable devices attached to this Mac, including Macintosh HD and external USB or DVD. This will make sure the Mac is powered off.Step 3: Hold the Power and Option key simultaneously for 15 seconds. How to Install macOS on Mac from USB Drive (Normal Way)If the target Mac computer already had a macOS or OS X on it, then installing macOS from USB is straightforward and this is called the normal way.Step 1: Insert the macOS bootable USB drive on a USB port of Mac computer.Step 2: Shut down the Mac and wait for 1-2 minutes.As soon as the process starts, it will provide Terms and Agreement page and your job is to agree with the same and then click on the continue button.Step 7: After that, click on the 'Continue' button to start the installation process. Pleasec choose APFS (macOS) or Mac OS Extended (Journaled) for old version Mac OS X.Step 4: After the completion of the formatting process, go back to the macOS utility section and this time, select 'Reinstall macOS'.Step 5: Further, go to the Startup Manager, move to the External drive section, and select your bootable macOS USB drive.Step 6: Now, the configuration of MacOS will start. From the Disk Utility app, select Mac drive name under Internal section and then click on the 'Erase' button.Step 3: You will get a couple of options from the Format. You have to boot Mac into Recovery mode and format the hard drive or SSD to Apple file system first.Step 1: Shut down your Mac and press the Power key to turn on the Mac then immediately press Command and R keys.Step 2: You will be directed to the macOS utility section and here you need to select 'Disk Utility' to format the USB drive. How to Install macOS on Mac from USB Drive (Advanced)If the drive was not partitioned or the partition table was corrupted, then you can not install macOS on Mac with the normal way. Batch mail converter for macApplication is damaged, can't be used to install macOSYou the message "application is damaged, can't be used to install macOS" appear on your screen, it means the OS certificated has been expired. If it's fine and still you are facing the error, then just update the system Time & Date with the option of "Local Apple time server". MacOS could not be installed on your ComputerIf you see the error message similar to "macOS Could Not Be Installed on Your Computer" that means, either your system is not compatible or the Date and Time settings in your system is not up to date.To resolve the problem, first, check the system combability for the OS X. In such case, just cross-check the system requirement for the OS you want to install on your Mac system.You can fix this issue just by downloading the original OS file from the Apple store and then create a fresh bootable USB using the same. Compatibility errorIf you are upgrading the OS X after having an older version, you can get the compatibility error message. Mostly, this error happens when you download Mac OS file from an unauthorized site.You can fix this issue just by downloading the original OS file from the Apple store and then create a fresh bootable USB using the same. Mac sierra dolphin emulatorIf you had other issues not mentioned in this article, please contact us and our technical team will help you fix it. ConclusionThe above tutorial covers most of the issues you could come across during the installation process. If the OS files will not be copied successfully using the bootable tool, then you may see the message like "MacOS couldn't install on this computer".In this case, you should avoid using a third party bootable tool despite you should create a bootable USB with the help of command. MacOS couldn't install on this computerSometimes, the thirty-party tool which you use to create a bootable USB is the culprit.
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