Can an usb 3.0 external hard drive be plugged into a snow leopard iMac purchased 3/29/10 and upgraded to osx 10.9.2

Can an usb 3.0 external hardrive be plugged into an Imac snow leopard purchased in 3/2010, and upgraded to osx 10.9.2. Is an adaptor needed?

Yes. No adaptor is needed.
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Lion works fine, but it wont recognize my external hard drives. Everything worked with Snow Leopard. Is there a fix?

Lion works fine, but it wont recognize my external hard drives. Everything worked with Snow Leopard. Is there a fix?

What's the URL of the page?
In the mean time clear the cache and reload the page.

Airport Extreme won't show the WD external hard drive I plugged into the USB port. How do I connect my external hard drive to my network?

I plugged in my WD external hard drive into my Airport Extreme via the USB port. The hard drive will not show up in the disk section in the airport utility... How do I hook an external hard drive up to the airport extreme? I have tried 2 different WD hard drives. I must be missing something!!!
Thanks!

To be recognized by the AirPort for sharing, the WD HDD has to be formatted in either HFS+ (ideal) or FAT32. The easiest way to format the HDD is to use the Disk Utility in OS X.

MBP suddenly doesn't find my external hard drive when plugged into the USB port

Last night I worked on some wedding photo editing and let the laptop battery run all the way down forgetting to eject my Seagate external hard drive. I got the message when I booted it today that I didn't properly eject. Now it won't "see" the hard drive in any of the USB ports, but the hard drive is lit up so juice is going to it. Any ideas how to fix this one?

Open Disk Utility first.
Insert the drive.
If it appears in Disk Utility, use First Aid (Repair Disk)
This should be called (Repair Directory).
If it does not fix everything on the first try, run it again until it fixes everything or gets stuck.
Report any remaining error messages.
Consider getting an external Power supply for that drive.

Can't access my External Hard Drive when plugged into my HP netbook

I just bought the HP Pavillion dm1-3214nr. I hooked up my WD external hard drive, the netbook recognized it but there was no option to open the files on it. I'm not great with tech stuff but it seemed that the drivers or whatever for the device are up-to-date. The device didn't appear under My Computer. I tested an older external hard drive and it worked fine, appeared under My Computer, accessed the files, etc. Both EHD were used previously with Macs. Any idea how to access the files on the EHD?

Hi,
Could you check and let me know the details for both the EHD (model & capacity).
Normally HD that work on MAC,sometimes dont work properly with WINDOWS, coz they use a different file system.
The HD that worked, should be compatible with both MAC and WINDOWS, some HD have a built in firmware that can support both operating systems.
I am a HP employee.

What external hard drives are compatible w/ lion, snow leopard and time machine?

I am looking to buy an external hard drive to back up all data on my Macbook Pro that is currently running Snow Leopard, then upgrading to Lion. I want an external hard drive that is compatible with BOTH Snow Leopard (for use of creating a backup prior to my upgrade) and Lion (for daily use once I've upgraded). I also don't want to spend more than $100 if possible. Any suggestions? Thanks!

There is currently a shortage of drives due to flooding in one of the countries in which they are manufactured.
Getting one for under $100 at this point might be difficult. You didn't mention how full your current hard drive is, but for Time Machine, you should plan on two to three times the data you currently have (or expect to have).
I looked through Newegg's selection and didn't see more than a couple 1TB drives for less than $100. I recently bought a 3TB drive for $150. They're in the $200-$300 range, now.
I always buy bare drives and put them in an enclosure I buy separately. All the name-brand, ready-to-use drives come with a bunch of software you don't need and some of their software causes problems.
I had some bad luck/bad customer service with Seagate, so I've been buying Western Digital. Though, my replacement drives from Seagate have been going fine.
I've used Icy Dock and MacAlly enclosures. Both have worked well. If you do decide to go that route, you must make sure the enclosure can support the size of drive you buy (both physical--2.5" or 3.5", and storage size--1TB, 2TB, 3TB). The controllers in the cases may not be able to handle a 3TB drive, for example.
No matter how you go, you have to decide what kind of interface you want to use. USB is cheaper, but Firewire is faster. Firewire 800 is even faster, but costs more. All of that depends on what ports you have on the computer. OS X doesn't currently support USB 3.

My External hard drive keeps ejecting randomly in Snow Leopard. How do I stop this, and prevent it from happening?

I'm currently running a clean install of Snow Leopard version 10.6.8, and I have done nothing but attempt to mount my external hard drive, which is a Fantom 2 TB Greendrive connected via eSATA through an ExpressCard.
It performed flawlessly in Leopard, and I had no issues with it whatsoever. Then, I performed a clean install of Snow Leopard (erased the drive, and installed via DVD), and when everything had finished, I brought up a finder window, mounted my External Hard drive, and attempted to drag a folder to the desktop. It got to about 15%, and froze. Then, a few seconds later, it told me that I had removed it without ejecting it safely.
It continues to do this every time I try to move a large file to my cleanly installed internal hard drive. It varies on the amount of time it takes to 'eject'. Sometimes the file will get almost halfway there, and then the progress freezes, the 'eject' error is thrown, and my drive dismounts.
The file is about 6.2 GB, and it's vitally important to my livelihood to get this drive working reliably. (It contains CS5 (legitimate copy), as well as extremely important personal files, and i'm a freelance Web Designer and Developer, as well as writer and blogger.)
Short Version:
OS: 10.6.8 (Snow Leopard, clean install)
External: 2TB Fantom Greendrive (eSATA through ExpressCard)
Issue: Randomly ejects drive while transferring larger files.
Any help would be greatly appreciated! Thanks so much!
Taylor Daughtry

I have the same issues, The drivers are not great for eSATA right now. I think apple is puting all there effort into Thunderbolt. Ther should be a Thunderbolt to eSATA adaptor soon, untiull then you might want to get a firewire enclosure for you drive as I have had to do.
Maybe you can blog about my app? www.BeautifulClockRadio.com
Mark

WD 1TB External Hard Drive won't work with Snow Leopard

Hi all,
I recently purchased a Western Digital 1TB External Hard Drive. It came formatted for Windows with NTFS, but I didn't think this was a problem as the packaging stated it could easily be reformatted for Mac OS. To cut a long story short, it couldn't. When I plugged it in to my Mac (iMac 21" i3) and tried to use Disk Utility to reformat it, partition it, whatever, it just wouldn't work always returning some sort of error. I resorted to using a Gparted Live CD and succesfully formated it to HFS+ but yet when I plugged it into my Mac it wouldn't mount the disk. After following advice to let Disk Utility 'Repair' the disk, this is the output:
Verify and Repair volume “external”
Checking non-journaled HFS Plus Volume.
Checking extents overflow file.
Unused node is not erased (node = 1458) [In red]
Checking catalog file.
Unused node is not erased (node = 5) [In red]
Checking multi-linked files.
Checking catalog hierarchy.
Invalid directory item count [In red]
(It should be 1 instead of 0)
Checking volume bitmap.
Volume bitmap needs minor repair for orphaned blocks [In red]
Checking volume information.
Invalid volume free block count [In red]
(It should be 244164065 instead of 244148705)
The volume external was found corrupt and needs to be repaired. [In red]
Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files. [In red]
If anyone knows what this means, and more importantly anything I can do to try and fix this, I would really really appreciate the help!
(Obviously I see it says reformat the disk, but this is easier said than done. Now Gparted crashes when it tries to read it and Disk Utility hangs indefinitely if I try to do anything to it)

asad.a wrote:
I believe the reasons behind this must have something to do with the errors highlighted by the repair process (as copied above)- errors I don't understand.
Disk Utility can't repair NTFS volumes.
If the drive is not seriously damaged ...
Go to Disk Utility
Click on the external Drive (not on the existing partition)
Click on Partition section in Disk Utility
In the Pane under "Current Scheme" highlite the Partition and then click the "-" (minus) sign down left.
Click on the dropdown "Current Scheme" and choose a matching scheme
On Format choose "Mac OS extended journaled"
Click "Apply"
Message was edited by: lupunus / typo's fixed

External hard drive & time machine (updating to snow leopard)

I have just bought a non-Apple external hard drive, but haven't used it yet (still packed up!). I am about to update to Snow Leopard and wondered what was best to do with backing up my hard drive (mixture of music, important files etc.).
Is it worth using time machine, or just back up the files myself, or a mixture of both? Also what about partitioning etc?
Guidance would be appreciated to a new Apple user, and moderately literate computer user!

definitely back up the whole system. do not back up piece meal. that's bad for a number of reasons. First, it's VERY easy to miss something important that way. second, if your snow leopard install goes bad or you want to go back to leopard for a while for whatever reason (say, some apps you use are not yet SL compatible), it's very easy to do if you have a full backup and quite unpleasant if you don't have one.
You can use Time Machine or make a bootable clone using CCCloner or Superduper.
Both Time machine and a clone give you an easy way to restore your old system exactly as it was at the backup time.
the external drive should be formatted mac os extended journaled with GUID partition scheme. most new drives are formatted with MBR partition scheme so you'll likely have to completely reformat yours with disk utility.
For more info consult FAQs link at the top of the TM forum page.
Message was edited by: V.K.

I have never done a backup; i don't have an external hard drive ; i want to intall snow leopard...is it important to do a backup first?

i have never done a backup; i do not have an external hard drive;
do i need to do a backup before i upgrade/install snow leopard?

Most commonly used backup methods
OS X 10.4/10.5 need to upgrade, 10.6.8 ok still
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

Lacie 500GB Porsche USB 2.0 external hard drive will not sleep

Hi there,
I bought a Lacie 500GB Porsche USB 2.0 external hard drive that shipped along with my new iMac. I have noticed that even though I check to "put hard drives to sleep" when not in use under system preferences, this hard drive will never sleep. I have to eject it and then turn the hard drive off. Anyone know how to fix it or know if it is a Leopard or Lacie issue that might be fixed with a driver or firmware update?

Hi,
I just got the same drive and was wondering the same thing. I inquired with LaCie about it and here is the response that the support people gave me:
"That particular unit does not sleep. We changed the bridge to the newer controller, which is faster and better for data transfer, but that feature was dropped from the design. I'm sorry."
Hope this helps.

After I installed Lion, my MacBook Pro can no longer detect my external hard drives or my USB flash drives. What should I do?

After I installed Lion, my MacBook Pro can no longer detect my external hard drives or my USB flash drives. What should I do?

And me -- My Mac at work running Snow Leopard reads the drive normally. My home Mac (on Lion) can't even find it....
Yet another Leo let-down.....

I made a bootable disc on an external hard drive, with Yosemite on it. I am running Snow Leopard on my iMac. How can I open the Yosemite disc from the desktop on my iMac? Does the external hard drive need to be connected to my iMac by firewire to

I made a bootable disc on an external hard drive, with Yosemite on it. I am running Snow Leopard on my iMac. How can I open the Yosemite disc from the desktop on my iMac? Does the external hard drive need to be connected to my iMac by firewire to do that?

kahjot wrote:
Snow Leopard's Startup Disk pref can’t see Yosemite volumes. So the only way to switch from Snow Leopard to Yosemite is to do what Niel mentioned. Doesn't matter whether it's connected by USB or Firewire, although performance via FW would be faster.
Are you saying that Yos/10.10, as a volume located in a mounted external drive won't appear as an option in Snow Leopard's Startup Disc, in Sys Prefs? I've never heard this one before. AFAIK any mounted volume, regardless of OS, should appear there. I would think that, if it appears in the Boot Picker/Startup Manager it would also appear and could be booted to from Snow's Startup Disk. I can't test this myself, since I don't have Yos. Is what you are saying documented somewhere?

USB 3.0 External hard drive working only as USB 2.0

Hello all.
I have a MacBook Pro mid 2012 (specs below) which has two USB 3.0 ports. I have a Kingston USB 3.0 stick and a Toshiba 1TB USB 3.0 external hard drive. With Lion/Mountain Lion/Mavericks, both stick and hard drive worked fine, but since I updated to OS X 10.10 Yosemite, both work as USB 2.0 devices, with slow transfer speed and, in the case of the hard drive, it has a blue/white LED that indicates the mode (blue = USB 3.0 / white = USB 2.0) and it only lights up with white color.
It's not a device problem, because both work on Windows 8.x machines. I was guessing that it was some kind of firmware or motherboard's usb driver problem but I looked for firmware updates and found nothing.
Is anyone having issues with USB 3.0 ports? Can you help me with this? Any advice would help.
Thanks a lot for your patience and help.

Hi jesusbet,
Thanks for visiting Apple Support Communities.
It sounds like the USB 3 ports on your MacBook Pro are not operating at the expected speed.
The first troubleshooting step I'd suggest in this case is to reset the System Management Controller (SMC) on your MacBook Pro using these instructions:
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
From:
Intel-based Macs: Resetting the System Management Controller (SMC)
If the symptom continues, you can also reset the PRAM:
OS X Yosemite: Reset your computer’s PRAM
These two hardware resets can resolve many unexpected behaviors that affect hardware on a Mac.
All the best,
Jeremy

Can I install onto an external hard drive + run off it?

Can I install onto an external hard drive + run off it?
If possible, will the system run at the *same* speed as the built in hard drive?
ALSO: Am I correct in saying that if I replace my current hard drive with an SSD one?
If so: that *****
Thanks
Omar

OS X doesn't matter what disk you boot from, as long as it can be formatted properly in Disk Utility. You can boot from a USB stick drive if it's big enough.
Thunderbolt would be the fastest, the drive would be the limiting factor there. You can find Thunderbolt drives like these at stores like macsales.com. But USB 3 might also feel fast enough.
If you have boot systems installed on many drives connected to your Mac, the way you tell the Mac which one to use is to hold down the Option key at startup. This will present icons of all the connected drives you can boot from, then you just pick one and go.

Can an usb 3.0 external hard drive be plugged into a snow leopard iMac purchased 3/29/10 and upgraded to osx 10.9.2

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