To erase and format any drive connected to a Mac computer running OS X Yosemite, use Disk Utility. Simply erasing a USB drive in Disk Utility will automatically format it too. Because there are different types of formats for different purposes, it's good to know the differences before accepting the default settings. Format external drives to Mac OS Extended before using with Aperture Tips on preparing a new external hard drive for use with Aperture. You may wish to use an external FireWire or USB hard drive to store your Aperture Library, referenced images, or Vaults. Use Disk Utility to Format USB Flash Drive on Mac. The simplest way to format a disk in Mac OS is to simply use the Disk Utility since it is the Mac’s built in disk maintenance tool. To format USB drive on Mac using this method, all you need to do is plug in the USB device into your Mac and select it from the Disk Utility’s sidebar menu. To share a USB drive between a Mac and a Windows PC, there are two disk formats to choose from: exFAT and FAT32. The other formats -- Microsoft's NTFS and Apple's Mac OS Extended -- don't work well on the other operating system. Format usb for mac use. A Seagate external hard drive is pre-formatted with one NTFS partition, which may limit its usefulness for some users. However, it can be divided into as many partitions as you wish, with either Macintosh or Windows partition schemes and file systems. FAT32 can be formatted larger than 32GB and Windows will recognize a FAT32-formatted partition larger than 32GB -- it's just that Windows XP's disk management utility will not let you format a FAT32 volume larger than 32GB (go figure!). It's possible that you've selected an incompatible partition map format for the drive. A FAT32 volume needs to have the 'MS-DOS' (or something similar to that -- I don't have the means to verify at the moment) partition scheme in order to function properly. When you select your hard drive (not the indented volume below the hard drive) in the left-hand sidebar and select the 'Partition' pane, click the 'Options.' Button below the graphic of the partition scheme and ensure that the correct partition map scheme is selected. The mac I am using is a 3.5 year old ibook, mac osx version 10.3.9. I am aware of the file transfer size limitations of the FAT format. It will not be used for any large files, but rather a lot of smaller files. To be more specific about my predicament, I currently have a desktop PC and a Mac laptop, but my version of Windows XP has crashed an I am using a Linux boot disk to try and recover the files from the PC internal hard drive. However, I am having trouble getting the Linux OS to recognize my external HDD. I have been informed that if I reformat the drive into a single FAT partition, I will be able to write to it from the Linux OS on my PC, and I have done the research to figure out how to use my Mac laptop to do this, but I don't seem to have that option. When I am in Disk Utility, Erase tab, I have the option to erase the disk with an MS-DOS File System Volume Format, which I have done. This makes the external HDD readable on the Linux PC. However, it is not writable. On the partition tab, I do not have the choice to create an MS-DOS or FAT partition, nor do I have an options button below the graphic of the partition scheme. If anyone has any suggestions on what I can do, I would greatly appreciate it. Hi, you probably already figured out how to do this but I thought I'd reply in case others have searched and ended up here. I'm using 10.4.11. In Disk Utility, since I only needed 1 partition for my whole external drive, I just used Erase.
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