Patience: Obviously, this process will take some time so you need to make sure you have an hour or two to spareĪfter making sure everything is ready, it’s time to prepare your Mac for the installation. For this reason, you need an external HD that is at least the same size as your Mac’s internal memory External hard drive (optional): You need to back up your data to save your important files before installing the new macOS. Make sure the installer is fully downloaded (about 5 GB) Good internet connection: You need to download the macOS High Sierra installer from the App Store. Blank USB drive: You need a flash drive that has at least 16 GB of available storage space to create a bootable macOS High Sierra installer. Requirements to create a macOS High Sierra bootable USB driveĬreating a bootable drive with a High Sierra installer is quite simple. 
Installing macOS the clean way (using a non-startup drive). Creating a bootable USB using the Terminal. Requirements to create macOS High Sierra bootable USB drive. It’s not hard at all, and in this article, we will guide you through: It makes sense to create a bootable USB flash drive to install the High Sierra operating system if you want to quickly install it on several Macs without having to download the installer each time. The app will help you delete junk, duplicates, and unnecessary apps in a couple of clicks. MacKeeper allows you to free up necessary gigabytes easily. However, you need at least 8 GB USB Drive or more then it, it can be better.Please note that before installing any system, you need to ensure there is sufficient space on your Mac. Be aware that you are selected the Mac OS Extended (Journaled) from the format list. Then navigate to search bar of macOS High Sierra, then type there DISK UTILITY, after that, click on erase button. Before to start the process of creating a bootable USB you need to insert the USB drive to your computer. 
Before going to download you need to create an account on TonyMacx86 after that, the download link will appear on the list. Download Unibeast for macOS High Sierra from tonymacx86. Download the latest version of macOS High Sierra operating system from App store or.
How To Create Bootable USB For Mac OS Sierra on Windows. And more there are more tricks to create bootable USB for macOS High Sierra that you can use them. However, without this tool, there is TransMac that you can use them on your Windows operating system. This is an all-in-one bootable USB drive can also be used as a rescue boot drive for system recovery. UniBeast is a tool by MacMan and tonymacx86 to create a bootable USB drive from any Mac App Store purchased copy of OS X. 
Install Unibeast to create macOS High Sierra bootable USB.
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