It works fine, but it's definitely not anywhere near true SSD performance (and I know where you're coming from as I have the exact same MBP you have, albeit mine has a pair of SSDs inside). I did this for a client last year with a very fast SD card. SSDs and standard flash drives use different types of memory and different controllers, which explains the difference in speed, reliability and price.Īlso, you don't want to have anything protruding from the body of the Mac when you carry it around so as not to damage the USB ports, so you'll either have to shutdown and remove the drive before putting the MBP in a bag or pick a really low profile flash drive.Īll you need to do is format the drive with a GUID partition (default HFS+ formatting), install OS X on the drive, then hold the ALT key when booting to pick the USB drive as the boot drive.
Yes, you can and no, it won't, unless you're talking about a USB3 SSD flash drive, which are relatively rare (and expensive). Can I do this? Just boot from USB every time and use that as the hard drive? Will it perform as if I had upgraded to an SSD? Make A Bootable Catalina USB Installer - Boot from USB Flash Drive and Install Mac OS X Gemsbok Apple Tips and Tricks 47K views 3 years ago How to Install MacOS Catalina 10.
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