I've bought an external 4TB HDD. It is this . The problem is that my Macbook Air 11" 2013 (with Mac OS X 10.9.2) does not recognize it.  The device is ok. I can use it from other computers with GNU/Linux. But I don't know what happens with my Mac. Disk utils app does not show it in the volumes list, diskutil command either.
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I want to do a clean install of el capitan OS. I booted to recovery mode, chose reinstall os x and followed the steps. So far so good. When it came to choose the destination disk where I wanted to install the OS, it did not show any hard drive, i.e Macintosh HD was not shown so I could select it. I figured I had to format it first. So I close the installation and went to Disk Utility. The problem is Disk Utility is stuck at loading and does not show anything.   My OS is corrupted, that is the reason why I want to do a fresh installation. With corrupted I mean, I can boot my system only if I go to single-mode and mount the hard drive with mount -uw / and then exit. But this is not a long term solution. I search everywhere in the web and there are many solutions out there, but none worked form me.  I tried erasing and formatting the hard drive when in single-mode with the help of diskutil. But this did not work because the DiskManagement Framework was missing. So I tried loading the files manually with launchctl. But still I can not use diskutil in single-mode.   I tried also fsck, it did not do any good.   I ran out of options. I don't know what to do.  Here is an image when I try to erase the partition via Disk Utility    And here is an image when I try to reinstall the OS. No Hard disk is shown to select
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I am on a MacBook Pro 13 running latest Sierra. I have an external Seagate solid state hard drive that was working and out of the blue stopped working. The only thing on it was my Adobe Lightroom images/videos. Not the LR DB files. I'm sure you have all heard this woe before, so I won't dwell on that. And yes, I back up to the cloud. AWS S3 specifically. Though I am traveling South East Asia for the last year, and staying in cheap hostels. So good internet is hard to come by sometimes. I can't back it up after every export. While most of it is backed up, there is some that is not.  Moving on. The symptoms seems to change every time I plug it in. The first sign was it ejected on it's own. I plugged it in again, and it wouldn't mount. Disk Utility recognized it, so did the command line diskutil list but it wouldn't mount. I rebooted and it worked for a second. Then I could only get to it from the command line. Then trying to frantically back up to my local what was not backed up to the cloud, it all failed. Basically just a cp -R [directory] [local-directory] command.  After some more frantic unplugging and re-plugging plus some command line manual mounts, I finally got it to where the Disk Utility would be able to run first aid on it. It failed. I don't recall the error. So I put it in a freezer. After a few hours I tried again. It is not any better. It still will not mount. Now Disk Utility sees it, but with no partition. I can't even give me information about how much space is used on it.  I have also tried it from a Windows machine. It did not mount. I have tried other cables. No success. As well as tried my other USB port. I also have another working external hard drive exactly like the one giving me issues. It works on all cables and USB ports.  I do have Docker running with a Ubuntu container, I'm trying to think of a way to see if I can try to get to the USB from there. I also have a USB that I have thought about running a live Ubuntu on there to see if I can mount and retrieve the data or fix the HDD that way. But if it will not mount, I doubt these will work.  Can anyone else think of any other tricks I can try myself to see if I can repair this or at least retrieve the data without paying for a service or software? If not, those suggestions are also welcome.  Update   I made the mistake in original post that it was a Solid State Drive. This is my mistake, it is actually a spinning disk hard drive. I bought them long ago and have been traveling with them for so long I just forgot. Question is updated to reflect this. Now diskutil list does not show it at all. The Disk Utility app also does not see it. Based on suggestion from @Allen I seeked out the USB to SATA cable. I did not quite find it, as my options are extremely limited where I am at. Though a local expat on a facebook group was able to help me with a empty 2.5 casing that I was able to extract the drive from original casing and put it in his blank case. It now mounts. Though it has the "click of death" sound to it. And data is not really reachable. While I can ls the directories and Adobe Lightroom does not have the exclamation mark when it can not reach the actual external files. Right clicking on the images and clicking on "Show in Finder" or any other variation of trying to get to the files through Finder or terminal, I have no success. It usually hangs and I get the spinning wheel. Since Adobe Lightroom imports these images into directories named by date, I am going to send the drive off to a data recovery service and ask to recover just unbacked up directories i.e. dates. Next time I will make harder efforts to backup and probably get an actual SSD.   I think this can be closed, due to my low reputation points I can not close this myself.
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Is there a safe, stable application for reading from and writing to  file systems on Mac&nbsp;OS&nbsp;X?  If not, what's the best way to access the contents of an ext4 file system on Mac&nbsp;OS&nbsp;X?
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What USB drive filesystem works out of the box on Windows, Linux, and OS X so that, when I give a 64GB USB drive to my dad, I don't have to tell him to first type in sudo apt-get install exfat-fuse exfat-utils ntfs-3g in the terminal, for example?
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I have 13 inch mid 2010 macbook pro. Just installed new 1T hard drive but now am hesitating on what to do next. I have my old hard drive converted to external drive and a back up drive as well.
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I have an Apple Time Capsule model A1254. It has a 1Tb drive. Is it possible to replace the drive with a larger capacity unit? It seems a shame to replace the whole unit. Thanks
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Does anyone have a Terminal command-line recipe for making a new bootable USB flash drive for one of the new MacBook Air's?  Is there a way to dd copy the USB boot device that comes in the box and make the new copy bootable?  I'd like to make a new backup copy of the USB rescue device for my MBA, preferably on a much larger flash drive with room for a backup of some of my working directories.  Added:  And is it possible to make, not just a rescue drive, but a bootable USB drive that will boot a fully updated version of the OS (say 10.6.8 or later)?  If so how on a MacBook Air 11, and how big a USB stick will this require?
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I am sure many of you guys know the flashing folder icon which shows up when the Mac cannot find a drive to boot from. My 2017 MacBook Pro has this issue for some time now, but recently I found something interesting.   The MBP won't find the boot drive, as long as the battery level is at > 70%.   The Mac boots just fine at lower battery levels; no issues whatsoever. Now, the problem is, I don't want to run my MacBook via battery the whole time or keep on disconnecting the AC power when 70% is reached every time.   Does anybody have similar symptoms and did find a better solution? Do you think there is a hardware issue with my device?   I've been to the Apple store before (when I didn't knew this was connected to the battery level) and they couldn't find anything. They suggested I reinstall macOS, which of cause didn't change anything.  Edit: One detail I forgot to mention was that when I charge my MBP and close the lid, it crashes and gets really hot (fans turn on slowly). I'm not totally sure on this, but I think this also happens with lower battery levels.  Battery Info:
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I replaced my HD with an SSD (256 GB), and restored the contents from my Time Machine backup (external HD 320 GB).  Now, after a day of working, I plugged in my external HD to make the next backup. Time Machine now started to scan my files, prepared the files etc. (took rather long, because it somehow needed to scan everything), then entered the "Deleting old backups" phase. Everything looked normal, but just when it was about to finish, it failed with "This backup is too large for the backup disk.".  Only about 200 GB of my SSD are used, so this should easily fit on the external 320 GB HD: Not many files have changed since the time I restored the backup.  When I look into the Time Machine drive, I see, that it has automatically deleted all my old versions already I'm really not happy about that! Only the latest one is left - the one I restored from yesterday, and now it seems to create a separate backup for my new disk? Ok, "200 GB x 2 > 320 GB", but that's not what it should do. It should just continue writing the differences, as it has always managed to keep several old versions, so why would it be any different just because I moved the contents to an SSD?   Is there a way to make Time Machine "reconnect" to the new SSD (I assume, it is still somehow "connected" to the old HD, and therefore doesn't treat the changes on my new SSD as changes to the backup?)  I wonder, if I should have rather cloned my HD (e.g. with a third party tool), without Time Machine knowing about it?
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My MBA 2012 with OS X 10.9.4 Mavericks won't boot anymore - it simply freezes after the initial jingle. I already tried resetting NVRAM and SMC, but to no avail. I don't have any time machine backups.  However, I still have a disc image of Mavericks sitting on an external hard drive, a USB stick and access to a notebook with Windows 7.   I haven't yet found any tutorial on how to create a bootable USB drive on Windows in order to reinstall OS X on my beloved Macbook Air.  Any help would be greatly appreciated!
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I tried to start up my computer and got a flashing file with a question mark.  So I held down the ⌥-key on boot and brought it into recovery-mode.  After going through the different options I went to the disk utility and all I see is the grayed out SuperDrive and below there is disk0 and Mac OS X Base system.   Leaving disk utility I went to reinstall Mac OS X. After the verification and agreeing the terms, it doesn't show my harddrive.   Did I unmount the harddrive or what could the reason it's not showing up?
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If you select "USB" and "Mac" on , it gives a series of command line instructions to make a USB key which the MacBook will boot into Ubuntu from.  I've followed them to the letter two or three times on different USB keys, and it doesn't work. There's a very great deal of technical discussion about EFI etc. but this set of instructions seems to suggest it should just work, but it doesn't.  Help? I'm increasingly unhappy with the more locked-down approach Apple is taking, and I'd quite like to start using Linux with a view to transitioning over to using it as my main operating system, but booting from the CD takes forever, runs slowly and I'm really hoping to get it moving off USB.  Can anybody help me?
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I just got my macbook white (2009) back again from fixing (batteries were swollen), and was trying to format it to OS El Capitan.  I've been trying to do that all day,    at first I tried with a bootable USB that I made on my on Mac (before formating for the first time). It didn't work, when I began the installation process - after formatting my MacOS drive, an error occurred. Ok, I was kind of expecting that.  the second time, I had already formated my HDD, so I made a bootable USB from my Windows 10 PC, using "TransMac".  I dind't work this time, and the next. The error is: I plug the USB, Mac iniciates and while I'm pressing the "Option" key, it only shows the USB drive, and when I click on in to begin the install/format, the "blocked" sign appears and it stops there, on that loop.   edit:  This is what happens when I turn on the computer holding the option key (with the USB plugged in):   My MacOS drive doesn't appear, only the USB.  When I click on the USB, it begins to load (I couldn't load all images). Then, when the bar loads, the "blocked" sign appears.
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I have a  external HDD. It has USB 3.0. It flashes blue if you connect it to a USB 3.0 port. If it is a 2.0 port, the light becomes white.  Yesterday, I plugged it in and the light was blue. Now, I plugged it in the same port and the light is white.  Can I somehow detect if the USB port I just plugged in is 2.0 or 3.0? I want to know if there is a problem with the device or the USB port I'm using.  Edit: I'm using Windows 8.1
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I have a 2011 MacBook Air(11-inch), I am using OS X 10.9, but I only have 64GB Flash Storage, and I  want to expand the storage of MacBook Air's hard disk. I asked geniuses at Apple and they told me the answer is no. So, is this possible?
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On some sources I have read that it is impossible to use external hard drives over USB OTG. Is it really impossible? Isn't there some kind of workaround? Update: Apparently ES file explorer can see the disk but can't open it. I heard there are such issues with NTFS hard drives on Android.
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Friend of mine dropped a HDD on the floor and every since the HDD won't mount when connected. It just makes this spinning noise inside for about two rounds and then it goes quiet. Obviously, he wants to salvage the data but I said to him I'll see what I can do knowing the chance of recovery is pretty slim with HDD that won't mount. Was I right about this ? Is there anything I can try I may not know about ? I tried to run gparted on it as I know gparted can detect disks that aren't mounted but connected. But no luck.