However, it is not easy to format the USB flash drive under Mac OS. It is very simple to format USB flash drive on Windows PC. Formatting or reformatting is the efficient and secure way to remove all data on the USB flash drive. How To Format Usb For Mac And Pc Windows 10īy Shirly Chen, updated on to Mac Data Wipeīefore we recycle, lend, sell or abandon a USB flash drive, we should remove all the personal data on the USB flash drive.Now that you have all the necessary ingredients, you’re ready to make a Mac OS X bootable USB using the DMG file of the operating system with the steps below. One high quality USB flash drive with 16GB of storage.