Then click the pulldown menu alongside Format and select MS-DOS (FAT) Give the drive a name (optional) and click the Erase button to format the drive.It is interesting to note that Hard Drive Manufacturers use the correct meaning of "Gigabytes" when referring to hard drives, and not what most people think of as a GB which is actually a Gibibyte:There was a separate track for each Mac/Windows/Linux and several manual and error-prone steps along the way. To our surprise there was nothing out there.A hard drive can be used on any type of computer - PC or Mac.Seagate branded external drives come preformatted, some for PCs, some for Macs, and some of them have special utilities.Gigabyte = 10 to the 9 bytes = 1000000000bytes = 1000 megabytesTip: Not sure what kinds of discs your Mac can burn. Tracks from your music CDs into MP3 files, so that you can store favorite songs on your hard drive. Gibibyte = 2 to the 30 bytes = 1073741824bytes = 1024 mebibytesSince Mac OS X also switched to this "proper" definition for storage units such as Gigabytes as of Snow Leopard, then the size of the drive as mentioned on the box is more likely to be accurate when formatted for a Mac Partition than for a Windows Partition where your usable space seems "lower".Note that all this is just so much technical drivel, your actual space available is the same on both, it's just that from a marketing perspective the given size will be correct on Mac as they have a common understanding of what a Gigabyte is, and incorrect on Windows which uses the commonly misused Gibibyte structure on it's filesystems whilst users incorrectly assume it is measures in Gigabytes.Technically manufacturers should use GiB not GB when marketting and packaging their drives, but they don't/won't, and use Gigabyte which they know practically everyone uses incorrectly.So, to make this a valid answer, the benefit is to know accurately the size of the drive you bought, and not have it magically shrink when you use it. Attach the drive you wish to format for dual compatibility to the Mac.We outline a range of straightforward solutions to an external hard drive not showing up on Mac in the following sections. Just tell them about your problem and receive quick and effective help with almost any possible tech issue.However, if you're eager to fix this bug yourself, keep reading. But there’s no need to panic! Just ask for help from a real pro, and they are easy to find!Download MacKeeper and access your personal tech expert, available 24/7.However, you could still check your preferences — just in case.Your settings might not be set to display external hard drives on your desktop. Edit your preferencesIf this is not the first time you’re using an external hard drive and experiencing such a problem, it is not likely to be an issue for you. Whatever happens, there are always ways to deal with it. But what if it’s not there? There can be many reasons for a Mac not reading a hard drive — poor connection, faulty cable or, in the worst-case scenario, corrupt hard drive data.
Then go to Sidebar and check Hard disks and External disks there as well. Make sure you tick the boxes next to External disks and Hard disks. Follow Preferences → General → Show these items on the desktop. Install kodi for mac 2017Use TerminalFor average users, the Terminal app is a last-resort solution because they tend to find it complicated. Try using another Mac or Windows device — if it only works on a PC, it’s likely that your hardware is not formatted to be launched on a MacOS device. Try Other Devices for Power SupplyIf you find that no matter what type of cable you use, the hard drive is still not showing up, the problem might be in your Mac’s hardware. Don’t forget to have your Mac connected to the charger. Check that your USB cable is delivering enough power to the hard drive and, if need be, swap to a more powerful connector or to a different USB port on your Mac.You could also use an external power source or even a self-powered USB hub — adding its power to the power of your Mac might resolve the issue. Normally, a device requires up to 500 mA, which can be provided by a standard USB 1.0 or 2.0.However, if your hard drive needs a stronger power output, it may work slower than expected or not connect at all. Then you can eject it by typing in diskutil eject disk_, with your drive’s assigned digit in place of the underscore If your system recognises the drive, this action should reveal the information about your drive. Type in another command — diskutil info disk_, with the digit of the external disk that you’re interested in in place of the underscore A list of your disks will appear — search for a line with /dev/disk_ (external, physical) — the underscore signifies a digit assigned to your disk’s identifier Type in diskutil list - a command that extracts information from the system to analyse any volumes and drives attached to your Mac Open Terminal by following Applications → Utilities → Terminal Format A Hard Drive And Pc On Full Disk AccessQuit Terminal and go to the Apple Menu → System Preferences → Security and Privacy → Privacy It locks down certain areas of the system and only relieves the lockdown during updates.To fix this error, you need to grant Terminal full disk access: This is not a software bug — it occurs due to additional System Integrity Protection security measures that Apple introduced in the newer versions of the operating system. It should now be able to mount normallyIf you’re running MacOS Mojave or Catalina, you might come across the “Operation not permitted” error when entering a Terminal command. It can help to access and repair some disk issues by checking partition Macs and performing additional checks across the system. Once you’ve added Terminal, click on the padlock again to disable access to editing.Disk Utility often becomes the ultimate fix for a lot of Mac problems, including those related to external drives. Look for Terminal in Applications → Utilities Click on the Plus button to add a new utility to the list. To make changes to the list of apps that have the permission, click on the lock symbol in the bottom left corner of the window and enter your password when prompted FAT32 and exFAT are recognised by both Mac and Windows devices. If you can’t see a volume list, your Mac can’t access the drive at all and you won’t be able to mount itMacs use HFS+ or APFS format, whereas Windows computers employ NTFS. If the drive has been mounted, there will be an option to unmount the device. Click on the volume for a menu to appear. The sidebar on the left will display any external drives — you should be able to view your hard drive there Click on it to open the drive’s information You should be able to see the external hard drive under the External heading in the sidebar on the left. Go to Applications → Utilities → Disk Utility Plug in the connector of your device slowly into the port of your Mac — this ensures proper initiation Copy all of the drive’s contents into a separate folder on the PC Locate the drive in the sidebar in the File Explorer Bear in mind — all of your hard drive’s contents will be erased during the processIf you can’t sacrifice the data on the disk, you can reformat it using a Windows device: ![]() As a result of the screening, you will be advised on any errors that your Mac finds on the disk. You will also see the options Restore and Erase — they act to clear any data from your hard drive, so if you store important documents there you should refrain from choosing those.Launch First Aid by сlicking Run and then Continue. If you right-click on the device’s icon, the First Aid bar will show up in a drop-down menu. It will then attempt to repair them. It checks the disk for any errors that could potentially cause the external hard drive not mounting on your Mac. Mac’s firmware can primarily access this information, such as before it starts booting when you restart it. Reset NVRAMNonvolatile random-access memory (NVRAM) stores local settings such as volume, screen resolution, and hard drive information. After that you can recover the data you’d backed up. If, by chance, they contain important information, make sure they’re not corrupted.If the First Aid process fails, you have two options: run the program again and repair the disk, or to back up all the data you possibly can, change the format of the disk and reinstall your current operating system. The list of affected files will be displayed in the DamagedFiles folder in your drive — you should delete them. Try Plugging It In SlowlyA strange feature regarding all USB cables — sometimes it may connect and function better if you plug it in more slowly. This causes your Mac to restart again — when you hear the startup sound for the second time, you can let go of the keysOn newer Macs, there’s no need to even restart the computer — just press down the combination for 20-30 seconds and your NVRAM will be reset. When you hear the startup sound, hold command + option + P + R Resetting it is easy and generally harmless, although it might mean that you’ll have to reset any basic custom settings you have on your laptop. Try a Different DriveIf you’ve tried all the methods described above, isolate the problem by plugging in a different external hard drive. This assists the proper order of events and hence mounting of your hard drive. Plugging in slowly applies power to the USB device and it gives the device extra time to initialise. The power contacts in your USB connector are designed to make contact with the USB port first.
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