The best USB encryption for Mac depends on the user's specific needs and preferences. Generally, it is recommended to use a third-party encryption software that is specifically designed for Macs, such as FileVault or BitLocker. Both of these programs provide strong encryption that helps protect data stored on a USB drive from unauthorized access.
To use either program, first format the drive in Mac OS Extended (Journaled) format if it isn't already formatted in this way. Then open FileVault or BitLocker and follow the instructions to set up the encryption process, which usually involves entering a password and creating a recovery key for future access. Finally, save files to the USB drive as usual. The data will be automatically encrypted when saved to the drive so that only authorized users can access it.