But the 'Scheme' popup menu does not appear in the panel. If I select the secondary item in that list (Lexar), I can successfully do a format operation. 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 Step 6: Once complete, your drive should have a single. Step 5: Click the Erase button to make these changes. The third one ( Apple Partition Map) is for booting old Macs (68K and PowerPC rather than Intel chips). Select MacOS Extended (Journalist) as the format and GUID Partition Map as the scheme. Why is this offered as a scheme for 'Mac OS Extended (Journaled)'? That really threw me, and prompted this Question. The second one ( Master Boot Record) is old, from the 80's DOS 2, for old PCs. Can I use the same USB on Mac and Windows PC To make a USB compatible with both Mac and Windows, you need to format it using Disk Utility on Mac and then change the file format to ‘MS-DOS(FAT)’ in the Format menu of Disk Utility. Booting is not an issue for my use of this flash drive. This format on USB will allow Mac to read and write files. I know the first one ( GUID Partition Map) is for booting modern Macs. Go to Applications and then click Utilities. Connect the USB flash drive to your Mac computer. Here I will format the drive to FAT32 for demonstration. You can follow the steps as below to format USB drive to HFS+ or FAT32 in Mac. 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: If you want to use the drive between a Windows and Mac machine, you can format it to FAT32.

File format for mac and pc scheme