This is also true of mac. OS, the later versions of the Mac operating system. GB is really the smallest size flash drive you should consider, and like just like most storage issues, bigger is better. Speed. Speed is a mixed bag for USB flash drives. In general, theyre pretty speedy at reading data but they can be agonizingly slow at writing it. Our primary purpose for the USB flash drive is to serve as an emergency boot and data recovery drive, so were most concerned with read speed. However, this probably isnt the best idea unless you plan to trash the computer or its hard drive. Leaving the computers operating system intact will make it. If youre ready to try Linux on your Mac, this guide to dualbooting Ubuntu and Mac OS will take you through the process step by step. The rEFInd Boot Manager Installing rEFInd. Roderick W. Smith, rodsmithrodsbooks. Originally written 3142012 last Web page update 10222017, referencing. A guide to installing Linux on your G4 or Core Duo based Mac Mini. Focus on read speeds rather than write speeds when you shop for a USB flash drive. And dont be alarmed when it takes longer than normal to install the Mac OS, because you will be writing lots of data. Type. USB flash drives are available in multiple flavors of the USB interface. While the standards tend to change over time, currently USB 2 and USB 3 are the two common interface types. Both will work with your Mac, but if your Mac has USB 3. Macs since 2. 01. USB 3 ports, you will want to use a flash drive with USB 3 support for the faster read and write speeds available. If youre using a Mac. Book with USB 3 C ports, you will likely need an adapter to go between USB 3 C and USB 3. Apple is the primary source for this type of adapter, but as USB C gains popularity, you will be able to find third party suppliers at reasonable prices for the adapters.