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All replies
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Helpful answers
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May 4, 2014 11:15 PM in response to hells-bellsby Mark Piaskiewicz1,Try repartititioning the HD on the Mac. Use MBR and format ExFat. I did this on my Seagate and it works fine on both Windows 7 and Mavericks.
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May 29, 2014 1:23 AM in response to Weeblerockby lowmaintenance,Just thought I'd mention, I've experienced this problem just recently and I found a workaround for myself and thought I'd share.
When I first bought my MBP, my EHD was already in use by my Windows PC, formatted in the NTFS system. I reformatted it after a while for other reasons on my windows PC. When I tried transferring some files to my Mac, it did not recognize the drive at all in Finder (other than in disk utility)
So I reformatted on my Mac in the ExFat and hooked it back up to my Windows PC. However, I could not drag files to the EHD. There was an error with the file system. Since I work with the hidden files showing on my Windows PC, I noticed that when you format with Mac, or use a hard drive with Mac, it creates some files and folders that are hidden.
Experimenting, I dragged those files to the desktop, reformatted my EHD to NTFS and dragged those files back onto my newly formatted drive. I unhooked it from my Windows PC and plugged it into my Mac and viola! It worked. So, it's recognizing it and working on both systems.
Hope this helps someone! My paypal address is....just kidding!
Brandon
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Jun 28, 2014 3:45 AM in response to Ella R.by carts79,Thanks Ella - this fixed it for me!
Well, it said that the repair failed and I'd have to reformat the hard drive, then I noticed it was appearing again… odd
Heads up to anyone else that tries this, you may have a different menu set up (as I did) - I had to go -
FINDER
APPLICATIONS
UTILITIES
DISC UTILITY
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Aug 6, 2014 10:58 PM in response to aiden.diasby KitchenDJones,Teachercreature737 has it right. I have a Lacie and I just tried to use it with the usb it came with. NO GO. I just went and dug out my Lacie extension usb, and it ended up being a power booster chord. and my iMac desktop instantly recognized it. even the power of a desktop didn't work with it, (so MacBooks, there is no way.) the light on the ext hd was solid before, and now, with the power booster usb extension, the light is blinking and transferring data. if you need the product info of this chord, here tis' ..Belkin Hi-Speed USB Revision 2.0 Shielded 28AWG/1P+26AWG/2C AWM E101344-C Style 2775 80c 30V www.belkin.com ID#49749. as with most things, you probably can't buy this at an apple store. I got mine at a mac mall store with the ext hd. if you aren't in an extreme hurry, find it on the belkin website.
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Aug 16, 2014 1:25 AM in response to quarantine1by Straker135,Quarantine1 thanks for this information that resolved the issue with my Seagate 500Gb Time Machine backup drive which uses a proprietary USB connector designed for USB 3. Unfortunately I have several of these lying around and must have attached the wrong one since the last time I backed up the Mac. The symptoms were as you described, absolutely no recognition of the disk by Finder or Time Machine. With the changed cable Time Machine happily began preparing the backup and the disk is seen by the MacBook Air 2013 again. It seems that very similar looking cables have different power ratings or internal connector classes. Unhelpful. I wonder how many have ditched a perfectly functional piece of equipment because the wrong connector has been used. BTW a USB 3 powered device wont work in a USB 2 port as the power rating is too low.
Thanks again
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Oct 3, 2014 7:29 PM in response to Weeblerockby Jimmy1969,I got it working...
Using a very short USB 3.0 cable fixed the issue. I'm using a 2013 27 inch iMac. To me it sounds like these new Macs don't put out enough USB power.
I learned this by buying a Seagate slim backup that uses just USB power. With that said, the cable has to be very short. So, by using this same cable on the AC/BUSS powered drive, it works.
Although I don't regret buying an additional 2TB drive. I know it will be used. It's a bummer that this was the solution that was figured out by an average user.
I hope this helps.
Seagate needs to replace that longer USB 3.0 cable with a shorter one, or throw it in as an option.
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Jan 22, 2015 10:43 AM in response to Jimmy1969by abaher,I had the same issue. My Finder was not recognizing my seagate external hard drive when connecting it to may Macbook Pro. Interestingly I left the driver in and after 6-7 it recognized it. This has since happened several times. I cannot explain why.
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Jan 22, 2015 6:18 PM in response to abaherby Mark Piaskiewicz1,The only thing I've seen make USB drives vanish is NTFS drivers added to OS X, of any brand. If I need to have a drive be accessible by both OS X and Windows I just format it as ExFAT.
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Jan 30, 2015 7:20 AM in response to Weeblerockby bfromdenver,I have a MacBook Pro and have been using an Rugged All-Terraiin HD to store my photos. This system has been working fine for over a year, then one day it just wasn't recognized. I tried several of the suggestions on line before downloading any thing. Then read the manual for the HD and it mentioned 'if the usb bus on your computer doe not provided the necessary power to operate the HD, connect the USB power cable...' Hmm? I had never had to use this cord before, but I tried it and it worked. Whew!!! 40K photos
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Mar 6, 2015 9:17 AM in response to Funkinby ArthurSeabra,I have a 4TB Passbook and in accordance to what everyone else is saying this thing is sensitive to power supple. I guess with all your precious information inside it should be. However my solution was quite different, and sort-of unexpected. To help anyone else who may be having this problem read on:
I had the correct power supply. There was almost 0% chance that I had accidentally swapped it with another. However I did plug it in to a Energy Surge protector. This was causing the problem of the drive not mounting/not being recognized by my iMac. So I unplugged it from the surge protector and plugged it in to a normal extension strip and voilà there it was, sitting pretty on my desktop.
This kinda worries me though, that I can't plug it in to a surge protector. I live in Brazil, and it is currently rainy season, so lot's of lightning. I lost a few things (including most of the internal parts of this iMac) to surges. I wonder if there is a way around this.
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Apr 25, 2015 7:06 PM in response to Bo.Lasaterby jenypher610,I had an identical issue with my Seagate external 1TB drive, which I've been using consistently for a few years (set up this machine with it from a previous Time Machine backup and have had no problems with it on either the old or new machine). This past backup failed - I tried to back up and could not see the drive. Tried all the regular things (plugged it, unplugged it, checked the cable, multiple USB ports, rebooted, etc etc).
When I saw this thread, I went into System Information and then Time Machine from there (just using the Time Machine prompt said it couldn't see the drive). However, in settings, the machine saw the drive -- but appeared to recognize it as a separate entity from the one assigned to Time Machine...I reselected it, and it worked. However, at no point did it show in finder or appear to be mounted. The backup is running as of this moment.
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May 2, 2015 10:45 PM in response to Weeblerockby !Eileen,After months of not using my WD hard drive I decided to plug it into my MBP to backup the system but it wouldn't appear on Finder like it usually does.
So I searched for "Disk Utility" > select the WB hard drive and clicked "Repair disk". Once the repair is complete, it was back on Finder.Hope this helps anyone at all.
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May 16, 2015 1:46 PM in response to Weeblerockby CoderDave101,Formatting my drive worked for me: Format external drives to Mac OS Extended before using with Aperture - Apple Support
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Jun 12, 2015 6:10 AM in response to Weeblerockby vorexfaiq,This is the step if your drive didn't recognised by System Profile.
You need another Mac to read your drive. On that another Mac, you need to view the hidden files.
Steps to view hidden files:
- Open Terminal found in Finder > Applications > Utilities
- In Terminal, paste the following: defaults write com.apple.finder AppleShowAllFiles YES
- Press return
- Hold ‘alt’ on your keyboard, then right click on the Finder icon in the dock and click Relaunch.
Select each partition on external drive and delete all hidden files except .Trashes
This time, make sure you Eject your external drive properly.
Plug in the drive to your Mac.