In the following examples, /dev/disk1 points to the SD card (device).This solution is not relevant for newer Mac OS versions, perhaps El Capitan 10.11 and onwards.The error may occur from Mac OS Leopard 10.5 to Yosemite 10.10.I am not sure which "older" versions produce the error, but it does occur in Snow Leopard 10.6.8 with diskutil version dated.This is an alternate solution for older Apple Mac versions where FAT32 as the filesystem type does NOT WORK as per the error above.Use diskutil listFilesystems to view a list of supported file systems Tuxera (who develop one of the commercial NTFS drivers for Mac OS X) have a list of free NTFS drivers that are developed from the same NTFS-3G source used by Linux to read NTFS drives.$diskutil eraseDisk FAT32 MYDISKLABEL MBRFormat /dev/disk1įAT32 does not appear to be a valid file system format For a while I've been using but as far as I can tell it hasn't been updated since December 2008. I'd love for someone to tell me differently. There are a few third-party products that allow Mac OS X to read NTFS formatted drives but as far as I'm aware the free ones aren't as well maintained as the commercial ones. Mac OS X has had support for reading NTFS formatted disk for a few versions, but still doesn't have write support. The default GUID partitioning scheme won't be recognised by 32-bit Windows XP and earlier Windows operating systems and Mac OS X versions earlier than 10.4. FAT32 (called MS-DOS (FAT) by Disk Utility a filesystem originally released in 1977 and updated a few times since, lastly in 1996) really is the only cross platform filesystem that is going to work fully out of the box with Windows and Mac OS X.īe careful though, if you are using Disk Utility to format the drive, you should make sure to choose the Master Boot Record partitioning scheme (hit the "Options." button below the "Partition Layout" control on the Partition pane).
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