New WD HD isn't showing up in Installer Disk Utility?

I've checked the connections numerous time and everything is properly installed. I inserted the installer cd that came with my laptop and the HD doesn't appear in disk utility so there is no way for me to format it. The only thing that does pop up however is the DVD drive and CD. I also checked profiler in utilities and it doesn't appear either. I have no idea what to do at this point.. I've read many other forums but nothing helped.
(Mid 2009 2.26ghz MPB)

Recently there have been a number of people having great problems with some of the WD hard drives and Macs...a lot of compatibility issues and non-recognized issues.
Did you order this drive from an on-line source or a retail supplier? Best advice would be to see if you can return it and get another brand that is more Mac-compatible. You can check sites that are Mac-friendly such as OWC to see what brands are sold to get some ideas of those that will work readily.

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I ran into Doug Cunningham at the DV Expo and he said to use the "Repair Lun Map" in RAID Admin... Worked!!!
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Hey everyone,
First time posting here so forgive any mistakes. I recently purchased a Late 2013 Macbook Pro Retina, 15-inch, 2.6 GHz Intel Core i7 from Apple. Previously, I had the late 2007 Macbook Pro model until a friend spilled some water on it and corrupted the motherboard. Regardless, I was using a Western Digital 1 TB external hard-drive to keep all my documents and files backed up, manually, alongside the time machine feature built in. (This was not connected at the time of the spill, and was not thereafter, so rule out water damage) During the period between when the old one died, (earlier this year May-2013), I kept the drive safely in storage because I knew I would want to transfer my 100gb music librairy along with my photos and other files when I finally got the new one later that year (was waiting for the hardwell processors to come out for the MBP). Just recently after this purchase I tried to connect the drive to my new MacBook Pro but it was not showing up. I have scowered the online forums for trouble shooting tips and took all the steps to no avail. I have replaced the data-drive cable with a new one, connected it to the wall outlet in case it wasn't drawing enough power from the laptop, among a few other simple tricks, but still it would not show up in either Disk Utility or the terminal command to show all active drives, all that's there is the internal Macintosh HD one. It was a fairly quiet drive-however I do notice there is not much of a 'spin-up' noise or any sound of it begining to work when turned on or plugged in, so I'm worried there might be something wrong with the drive itself. Nonetheless, the power signal continues to flash but still no recognition from the computer that it's there, so I'm certain it's not reading it. I have tried on my other buddys Mac and it is the same situation, as well as my roommates PC (which I figured wouldnt anyway because of how its formatted, but it was worth a shot) I am not sure which avenue to take next as I have all my files and college work that I still need access to on the drive, and would really hate to have to format the drive or anything drastic as such. Possibly there is a part I can buy and replace myself to make it start up and spin again, but I am not sure what that part could be or if there is an easier solution out there.
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Clicking from a hard drive is bad. Does the external drive have an external power supply? If it does I would use this supply.

My external HD stopped showing up on my desktop, but shows up in my Disk Utility.. I have tried a disk verify and repair - sometimes that works and completes, sometimes it doesn't. Either way, it wont eject or mount, and still doesn't show up on desktop.

My external HD stopped showing up on my desktop, but shows up in my Disk Utility..
I have tried a disk verify and repair - sometimes that works and completes, sometimes it doesn't.
Either way, it wont eject or mount, and still doesn't show up on desktop.
There are no ticking noises coming from the hard drive, and it lights up still, and i have tried replacing the cords, and restarting/shutting down the computer, and have tried it on a mac desktop also - same problem.
Any help would be great!!!

and have tried it on a mac desktop also - same problem.
Try this on one of the Macs ...
Open a Finder window. From the menu bar click Finder > Preferrences
Select the General tab then select: Show External Disks

All of a sudden our fairly new Air's memory is almost full. The disk utility lists almost 50 GB as "Other". What has happened to our memory?

All of a sudden our fairly new Air's memory is almost full. The disk utility lists almost 50 GB as "Other". What has happened to our memory? I am new to Apple products.

First, empty the Trash if you haven't already done so. Then reboot. That will temporarily free up some space.
When it comes to clearing space on a drive, you have to decide how much to clear.
According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation. You also need enough space left over to allow for growth of your data.
Although you may be told by other contributors to this site that you should keep some fixed percentage (such as 10% or 15%) of the space on the boot drive available, that advice has no basis in fact as far as I can tell. The amount of available space you need depends on your usage pattern. I don't know how much you should have, and I don't make recommendations based on what I don't know. It should certainly be more than 9 GB.
If your data collection is growing quickly, then, depending on the size of the startup volume, you may need more than 10% available space in order to avoid the risk of filling it up, which can lead to a boot failure. If your data is relatively static, you may need less than 10%. I've seen no evidence that there's a loss of performance when available space falls below any threshold higher than the one Apple recommends. Available storage space that you'll never use is wasted space.
If you're using Time Machine to back up a portable Mac, some of the available space will be used to make local snapshots, which are backup copies of files you've recently deleted. The space occupied by local snapshots is reported as available by the Finder, and should be considered as such. In the Storage display of System Information, local snapshots are shown as "Backups." The snapshots are automatically deleted when they expire or when free space falls below a certain level. You ordinarily don't need to, and should not, delete local snapshots yourself.
About local snapshots
Use a tool such as OmniDiskSweeper (ODS) to explore your volume and find out what's taking up the space. You can delete files with it, but don't do that unless you're sure that you know what you're deleting and that all data is safely backed up. That means you have multiple backups, not just one.
Proceed further only if the problem hasn't been solved.
ODS can't see the whole filesystem when you run it just by double-clicking; it only sees files that you have permission to read. To see everything, you have to run it as root.
Back up all data now.
Install ODS in the Applications folder as usual.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Triple-click the line of text below to select it, then drag or copy — do not type — into the Terminal window:
sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
Press return. You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up.
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When you're done with ODS, quit it and also quit Terminal.

External hard drive not showing in finder or disk utility

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Drive Preparation
1. Boot from your OS X Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
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First, just to make sure, Go to file at the top of the desktop under file/ preferences/ and see if show disks are still checked. If so run disk utilities if you haven't already done so, repair the disk and the preferences. See if that helps.

External drive does not show up in finder/ disk utility not able to repair

Hello,
My external drive does not show up in finder. But it appaers in DISK UTILITY. When I tried to repair it, it said:
Verify and Repair volume “ANNE HD”
** /dev/disk1s1 (NO WRITE)
** Phase 1 - Preparing FAT
** Phase 2 - Checking Directories
Unable to read directory (Input/output error)
Volume repair complete.Updating boot support partitions for the volume as required.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.
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Thanks a lot Niel,
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Mandymorphine wrote:
I had already found that page on my own hours ago and followed all of those steps repeatedly (probably about 5x apiece) and it failed to solve my problem. If anyone else has a solution for me that doesn't involve simply posting a link to an article, I'd appreciate it.
Any particluar reason why you didn't mention that in your 1st post in order to avoid wasting my time suggesting what you already did?
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Clicking from a hard drive is bad. Does the external drive have an external power supply? If it does I would use this supply.

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raccorsi wrote:
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Hello bechardj,
I would use the disk utility to verify and/or if needed repair the partition to help troubleshoot the issue
From the help menu item: https://help.apple.com/diskutility/mac/10.8/help/index.html
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As Disk Utility checks a disk for problems, your computer may become slow or unresponsive.
Open Disk Utility from Applications.
Select a disk or partition and then click First Aid.If you run First Aid on a disk, Disk Utility checks the partition maps on the disk and performs some additional diskwide checks. If you run First Aid on a partition, Disk Utility verifies the all the contents of that partition.
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All the very best,
Sterling

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Hi,
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New WD HD isn't showing up in Installer Disk Utility?

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