Id been hunting around online for a way to create a bootable USB so I could reinstall OS X Lion on my mid 2009 Macbook Pro. Thought Id share some useful information. Creating bootable USB for MAC OS X on Windows 10.You don't want to create your installer drive and accidentally erase the installer files while working with a spreadsheet or presentation. I highly recommend at least a 12GB flash drive that will be used solely for this purpose. You will need an internet connect and a flash drive with a minimum of 5GB of space. Let's do just that.I'll be demonstrating this on a 2017 MacBook Pro with High Sierra. That means-GUI!If you know such a USB drive is in your future, but do not want to toy with the terminal, you're in luck-the process can be done with the help of a handy GUI. We've already covered how to do this from the command line (See How to create a bootable USB to install OS X), but I wanted to give those with a fear of the command line a way to do the same thing.
Create A Bootable Usb I Download The InstallerDownload the installer fileThe first thing you must do is download the installer file from the App Store. I've used this inexpensive solution without fail. Don't forget, if this is a standard USB flash drive you'll need an adapter for the USB C ports on the laptop. Wd my passport for mac not showing up after updateBy default the tool will select your local drive-do NOT use that drive for the installer.Getting ready to create the bootable USB drive.You will then be prompted for your user password (or, if you have a touchbar, to touch the fingerprint sensor). Simply download the file, open up finder, change into the directory housing the download, and double-click on the downloaded file.Once Install Disk Creator opens ( Figure A), click on the top drop-down and select the correct USB drive to be used. This particular app is a self-contained piece of software, so there's no actual installation to be done. Download the GUI toolThe tool we will be using is called Install Disk Creator. The USB does not have to be formatted in any particular way, as the installer will take care of this for you. If you've already downloaded the file-it'll be listed as Open (otherwise, click Download).Once the download has completed, insert your USB drive and you're ready to go. Hopefully, you'll never need it. Wait until a new window pops up informing you your bootable installer has been created and is ready to use.Once complete, eject the USB drive and put it away for safekeeping. The process can take some time (about 10 minutes), and will seem like it's not doing anything (there is no progress bar). If the time comes to use this tool, insert it into the USB C port and boot the machine while holding down the Option key. With this handy bootable USB installer, you can reinstall macOS without much trouble. Don't be left high (sierra) and dryShould something go wrong with your MacBook or iMac, the last thing you need is to be left without the means to recover.
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