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Because if you do, you’ll be required to format and erase everything from it. Well, it all depends on whether you have anything stored on that old flash drive or not. You might be wondering whether it’s necessary to buy a brand new flash drive or whether it’s okay to use an old one to create a bootable installer for macOS.

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However, if you have a newer Mac model, you should get either a USB-C flash drive or a USB-C adapter to be able to connect the flash drive with your computer. If you have an older Mac with USB 3 ports, you can get the usual flash drive. Just to be on the safe side, it is best to use a 16GB USB flash drive the larger it is, the better.Īlso, be careful when choosing the USB type and make sure that it fits in your computer. For example, the macOS Big Sur installer is 12.6GB, so you need to make sure it fits in the drive. The required size of the USB flash drive depends on the macOS version that you wish to load. When choosing your flash drive, there are two main things that you should take into consideration: its size and type. Not just any flash drive can be used as a bootable macOS installer.

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You’re required to have an internet connection to be able to download the needed operating system from the web. You’ll need to decide on the macOS version that you need and download the installation file. You’ll need it to store the selected macOS version. Of course, you’ll need a computer to create the macOS USB installer. Here’s what you should prepare to make a bootable USB on Mac: If this is your first time creating a bootable macOS installer, don’t worry, it’s not as complicated as it may seem, and you’ll need only a few things to do it. What You Need to Make a Bootable USB for Mac? If one of your Macs won’t run properly, you can use your other computer to create a Mac bootable USB, then boot it on the Mac with issues and reinstall its operating system. However, when it’s impossible to boot into this mode, the only way to repair your Mac is by reinstalling macOS from a bootable USB installer.

If your Mac is troubleshooting, usually, you’ll need to use Recovery Mode to fix the issues.

To reinstall macOS even if the Recovery Mode isn’t working.

This is that special case when a previously created macOS USB installer can rescue a failing Mac since you won’t even need an internet connection to reinstall its operating system.

To reinstall macOS when there’s no internet connection.

This way, you won’t need to wait for the macOS version to download from the web on each of your computers.

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If you have more than one Mac and want to install a new macOS on all of them, you can use a bootable USB macOS installer to speed up the process.

To install the needed macOS on multiple devices.

Best app to clean mac os x update#

If you want to update your Mac but are not sure whether a particular app will run on the new macOS, or if you simply want to see how a beta operating system version works before choosing to switch to it completely, it’s possible to keep the previous macOS version and install the other one on a separate APFS volume. If you want to reset your device and make it look as if it’s new, you can create a Mac bootable USB installer, format the internal drive, boot your Mac from that flash drive, and install the new operating system.

To wipe your Mac clean and reinstall the operating system.

Here’s why you might need a bootable USB macOS installer: You might think that you don’t need it yet, but it is always best to have a flash drive with the needed macOS installation file ready, just in case. There are numerous situations when a bootable USB macOS installer may come in handy. Why Does One Need to Make Bootable USB on a Mac?

Best app to clean mac os x how to#

So, what do you need to make a bootable USB on a Mac, and how to do it? Let’s dive right into this question. But the truth is, the process of creating a bootable installer for macOS is pretty straightforward and takes just a few clicks of the mouse.

You might think that creating such a drive is complicated and something that only a tech-savvy might handle. Whether you want to dual-boot your Mac, have to install the new macOS version on multiple computers (and don’t want to spend hours doing it), or need to reinstall the operating system on your Mac, a bootable USB installer has you covered. Is it possible to make a bootable USB using Disk Utility on Mac?.Can I use Rufus to make a bootable USB for Mac?.Is it possible to create Mac bootable USB from Windows?.Method #2: (Manual) Make a Bootable USB on Mac via Terminal (createinstallmedia commands).

Method #1: (Quick & Easy) Create macOS Bootable USB Using Disk Drill.Why Does One Need to Make Bootable USB on a Mac?.