If the USB drive you want to encrypt is formatted properly, the process only takes a couple of clicks.
#Format thumb drive for mac 2019 which scheme how to#
If I select the secondary item in that list (Lexar), I can successfully do a format operation. How to create a bootable macOS High Sierra installer drive Put the macOS High Sierra installer on an external USB thumb drive or hard drive and use it to install the operating system on a Mac. No matter what Scheme I choose, I get an error when trying to format the item higher in the hierarchy in the sidebar to the left (Lexar USB Flash…), as shown in the screen shot above. Mysterious error when formatting higher item The third one ( Apple Partition Map) is for booting old Macs (68K and PowerPC rather than Intel chips). An alternative option is to create a recovery partition on a USB hard drive or thumb drive using Apple’s Recovery Disk Assistant utility. Why is this offered as a scheme for "Mac OS Extended (Journaled)"? That really threw me, and prompted this Question. Select 1 partition for the Volume Scheme, set the format to Mac OS Extended (Journaled) and give the drive a name. From here, you can change the name of the pen drive, its format, and the scheme. This will open the following pop-up menu. In order to format the pen drive, you need to click on the 'Erase' button on its toolbar. The second one ( Master Boot Record) is old, from the 80's DOS 2, for old PCs. Simply select your pen drive to view its storage settings on the right. Booting is not an issue for my use of this flash drive. I know the first one ( GUID Partition Map) is for booting modern Macs.
When using Disk Utility 16.3 with macOS Sierra to format a "thumbdrive" USB 3 Lexar flash drive (64 gigs), when I choose a Format of ‘Mac OS Extended (Journaled)’, I get a list of three Scheme items: