Use Terminal to create a bootable installerįor your external disk to run macOS, you can choose as a USB flash drive, as well as an SSD or HDD.In this article, you’ll find detailed instructions and answers to your questions on how to make a bootable USB on Mac. You can try out the different tools for free, so download it, and see what you think. MacKeeper can do everything from finding malware to updating your apps for you. When the scan is finished, review the results, and click Fix items safely.Select Find & Fix from the menu in MacKeeper.You can do that with MacKeeper’s Find & Fix feature, which will scan your Mac for a variety of different problems. It’s a good idea to keep your Mac optimised when you’re asking to create a bootable USB drive. It’s a handy appliance-even more so if you use a small external flash drive that you can carry in a pocket. You can also use it to reinstall the operating system on a Mac that won’t startup. Such a tool allows you to install any version of macOS on multiple Apple computers easily. Why would you want to create an external boot drive for your Mac? You can follow the Step 4 to install Lion on other Macs with the bootable USB you just created.A bootable macOS (previously, OS X) install disk is a portable device containing all the necessary installation files for a selected version of macOS. Now follow the on screen instructions to install OS X Lion.Choose the USB Flash Drive from there to boot.Hold down the alt/Option key on your keyboard when you hear the OS X start-up sound.Reboot your Mac with the USB drive plugged in.This will restore the Lion 10.7 image to the USB Flash drive.Make sure you have chosen the right USB drive, you don’t want to format the wrong drive and then click on Restore button.Then Click and Drag the USB drive from the left pane and drop it in the Destination field.Click and drag the IMac OS X Install ESD from the left pane and drop it in the Source field.Select the plugged USB from the Left pane on the Disk Utility and then go to Restore tab.Double-click on InstallESD.dmg (that you copied onto your Mac desktop) to mount the Lion disk image (mounted InstallESD.dmg should appear on Disk Utility application and desktop).Now click on Apply at the bottom right to start formatting. Select GUID Partition Table and click OK. Now click on Options button at the bottom.Input a name for the USB and Choose Mac OS Extended (Journaled).Select 1 Partition from the Volume Scheme dropdown menu.Select the plugged USB from the Left pane on the Disk Utility and click on Partition tab.Plug the USB flash drive into your Mac.Before formatting, If you have any data on your USB drive then save it.Locate the file named: InstallESD.dmg and copy it on your desktop. Now go to Contents > SharedSupport directory. Right click on the Install Mac OS X Lion.app file and select Show Package Contents Once the Lion downloading is complete, go to the Applications folder and find the Install Mac OS X Lion.app file you just downloaded If you have arranged the above mentioned items, simply follow the detailed guide below to create a bootable Mac OS X Lion 10.7 USB Flash Drive… How to Make Mac OS X Lion Bootable USB Flash Drive Step 1 – Locate the Lion InstallESD.dmg file Purchase and Download Mac OS X Lion from the App Store.You will have external media to recover and reinstall Lion in the event of total drive failure or some other catastrophe.The bootable Lion USB drive becomes a recovery disk with Disk Utility access, access to Time Machine backups, re-installation, and all other Recovery HD partition features.You can perform a clean OS X Lion installation with the bootable USB drive.Creating a bootable Mac OS X Lion 10.7 USB Flash drives requires medium level Mac knowledge, however, by following these simple instructions even a beginner should be able to install Mac OS X Lion via USB Flash Drive.
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