Nowadays, when you buy a USB drive, you can use it right out of the box with your Mac. However, unless it’s been designed for use with a Mac, it won’t be formatted using macOS’ preferred file system (either Mac OS Extended or APFS, depending on which version of macOS you’re running). That’s because most of the computers in the world run Windows, and Windows uses a different file system, usually one known as Fat32. ![]() ![]() Drives formatted as Fat32 can be read from and written to by macOS, but it’s not optimal and you’re more likely to run into problems than if you use macOS’ native format. So, if you’ve bought a USB drive that’s formatted as Fat32, or any other format other than Mac OS Extended (also known as HFS+) or APFS, here’s how to format a USB drive on Mac. The one exception I found where the manufacturer's format didn't meet my specific needs was when the drive was formated to FAT32 and I wanted to add a file greater than 4GB to it. I had two choices, break up the file or reformat the drive. Type the create partition primary command and press Enter to complete the task. After converting the USB flash drive from MBR to GPT format, you can use the steps below to create a bootable USB installation media to install Mac OS X. Download and install a copy of TransMac, which is the software that will make everything happen. TransMac is a paid software, but it has a 15-day trial solution, that give us more than enough time to move the DMG files to the USB drive from Windows. It’s exactly the same procedure if you need to reformat a flash drive on a Mac. How to format a USB drive on a Mac 1. Plug the drive into a USB socket (if you have a recent MacBook or MacBook Pro that only has USB-C connectors, you’ll need a USB-C to USB-A adaptor). Open a new Finder window and click on the drive. Esp ltd guitars serial number identification. Make sure it has no files on it that you need. The process of reformatting it will wipe all the data from it. Once you’ve copied any files you need from the USB drive to your Mac, go to Applications>Utilities and double-click on Disk Utility. Click on the USB drive in the sidebar and then choose Erase from the toolbar at the top of the window. In the window that drops down type a name for the formatted drive in the box next to Name. Choose a format from the dropdown menu. If you have previously stored sensitive data on the drive, click the Security tab. Choose a security level using the slider. The further to the right you move the slider, the more ‘passes’ the erase tool will make and the more securely files will be deleted. However, it also increases the time it takes to format the drive quite considerably. Click Ok then click Erase.
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