My Macbook pro will not recognize external devices

My MacBook Pro will not recongize external devices such as hard drives

I know that is of no help, but I have the same problem with a Toshiba harddrive. My wifes Macbook Air recognizes it. No problem with the hd I guess. But my macbook pro won't show it in the Finder, About this mac or disk utility - even though it is running. I would also be glad to get a solution to this.

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My macbook pro will not recognize my WD external hard drive 1tb

My macbook pro will not recognize my WD 1 tb external hard drive that I have as my time machine backup. I worked just fine for a long time now The only way I can see it is through Disk utility. And when I try to repair the disk it say it cant be repaired, and i need to back up files and reformat. All my backups are on the hard drive. How do I back up the back if I cant get it recognized? Uggghhhhh I have several years of info on the hard drive .. PLEASE HELP!!!

Hi cterry66,
Welcome to the Apple Support Communities!
I understand you would like to reset the user account password on your computer but do not know the original password. If you set up your Apple ID with that user account, you can use that Apple ID to reset your OS X user password. Please use the information provided in the attached article to complete the process.
OS X: Apple ID can be used to reset your user account password - Apple Support
Cheers,
Joe

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Details help - is this trying to sent email? What version of iPhoto? Of the OS?
The general answer is
in the iPhoto preferences ==> accounts delete your e-mail account and reenter it
OR
IMHO the better solution is to set Apple mail as the email client in the iPhoto preferences
LN

Since I installed the last Mavericks update, my MacBook Pro will not recognize my Nook ebook reader

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Check the Barnes & Noble or Nook websites to see if there are any Nook driver or software updates for OS X Mavericks.

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Ideas?
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Fijim

Thanks for the reply!
I had set up an appointment at my local Apple store previously so they could reinstall Mavericks, so I just went in a little early, showed them the error message, and they determined that it just needed to be reformatted. I didn't have anything on there that I needed, since I hadn't accessed it for a few years, so we wiped the drive, reformatted and now I have my back-up.
I appreciate the suggestions

Macbook Pro will not recognize my external hard drive

I just updated to a newer MacBook Pro. I ran Time Machine on my old Macbook from a 2TB external USB hard drive. When I hooked the hard drive to my new Mac, it wouldn't allow me to select it as the drive for Time Machine. So I dismounted the hard drive and hooked it back to my old macbook to see if it still registered there (which it did). Now when I try and hook the hard drive to my new macbook, it will not recognize it at all. First question, why will it not recognize my new macbook, and second question, why does Time Machine not recognize the hard drive? It has my old time machine files on it...hopefully I don't have to reformat it and lose all my backup??

My hard drive is now connected. But Time Machine will not let me select the hard drive as my back up drive. This hard drive was used on another Macbook, so Time Machine doesn't seem to recognize the hard drive on the new one. Do I need to reformat the hard drive? I hate to do that because I have the previous backups on there.

MacBook Pro will not recognize internal hdd

my macbook pro MB991LL/A 13" 2.53 ghz will not recognize the internal hdd, but when external boot drive is connected it will boot. ive tried two diff internal hdd and the same problem with both of them. i want to upgrade to an internal ssd but im not sure that its the drivee. any ideas on what the problem could be?

My hard drive is now connected. But Time Machine will not let me select the hard drive as my back up drive. This hard drive was used on another Macbook, so Time Machine doesn't seem to recognize the hard drive on the new one. Do I need to reformat the hard drive? I hate to do that because I have the previous backups on there.

My new Macbook Pro will not recognize my iphone in itunes...

I just bought a new Macbook Pro and was able to get all my files and such from my old computer, which was a Macbook about 4 years old. But the problem now is that when I plug in my iphone to the new computer it will not recognize the phone in my itunes. I authorized the computer for my itunes account and everything is updated I'm pretty sure... so how can I get my new computer to "accept" my iphone?

You can post in the iPhone forums:
http://discussions.apple.com/category.jspa?categoryID=201
They handle that issue on a daily basis.

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I have a MacBook Pro and it is connected to my HDTV via an HDMI cable and adapter. Yesterday my laptop was able to detect the external speakers in the TV and sound was coming out of my tv from my mac. But today my mac isn't detecting the external speakers and no sound is coming out of my tv. I've tried turning things on and off in multiple ways. Unplugging and replugging the HDMI cable/ adapter. Both of the cables are plugged in properly. Whenever I go to System Preferences>Sound>Output my external speakers aren't showing up. This is so annoying, help me please! Thanks.

I had this problem, too for my 2014 MBP. The output speakers did not show up when I tried to connect through the HDMI port. However, the output speakers did show up when I used an HDMI to Thunderbolt cable.

Macbook pro will not recognize startup password

my macbook pro ( one month old)is running the latest yosemite and suddenly will not recognise my startup password. after trying a few times it does not give me option to use my apple id to change the password. It just jitters and doesn't start up. How do I recover.

First, make sure caps lock is not on.
Another reason why the password might not be recognized is that the keyboard layout (input source) has been switched without your realizing it. At the login screen, you can select one of the available layouts by choosing from the flag menu in the upper right corner, if it's showing, or cycle through them by pressing the key combination command-space or command-option-space. See this support article.
If the user account is associated with an Apple ID, and you know the Apple ID password, then maybe the Apple ID can be used to reset your user account password. In OS X 10.10 and later, this option also works with FileVault, but only if you enabled it when you activated FileVault. It's not retroactive.
Otherwise*, start up in Recovery mode. When the OS X Utilities window appears, select
Utilities ▹ Terminal
from the menu bar at the top of the screen—not from any of the items in the OS X Utilities window.
In the window that opens, type this:
resetp
Press the tab key. The partial command you typed will automatically be completed to this:
resetpassword
Press return. A Reset Password window opens. Close the Terminal window to get it out of the way.
Select the startup volume ("Macintosh HD," unless you gave it a different name) if not already selected. You won't be able to do this if FileVault is active.
Select your username from the menu labeled Select the user account if not already selected.
Follow the prompts to reset the password. It's safest to choose a password that includes only the characters a-z, A-Z, and 0-9.
Select
 ▹ Restart
from the menu bar.
You should now be able to log in with the new password, but the Keychain will be reset (empty.) If you've forgotten the Keychain password (which is ordinarily the same as the login password), there's no way to recover it.
*Note: If you've activated FileVault, this procedure doesn't apply. Follow instead these instructions.

Late 2008 15 inch Macbook Pro will not detect external projector

I have a Toshiba projector that I am trying to hook up to my Macbook Pro for a presentation tomorrow. The computer will not detect the display. I'm using a DVI cable connected to the Mini Display Port. I know I've got the projector on the right input as my white Macbook with mini DVI will detect it but not display it properly (all green).
I've tried shutting down and disconnecting and everything. I need this to work asap.

Have you checked the screensaver and power settings, sleep display etc in the System Preferences?
You can throw this mega cocktail at it, see if it cleans up your problem.
Download the free OnyX here
http://www.titanium.free.fr/
Run ALL the maintainence and cleaning aspects, , especially the caches, you can cancel the reboot in between.
Finially run the Verify > Preference file check/repair and then reboot.
This should clean out all your caches and whatnot.
Then look at this support article about resetting the SMC/PRAM
http://support.apple.com/kb/ht3964
http://docs.info.apple.com/article.html?path=Mac/10.6/en/26871.html

HT1492 My new macbook pro will not recognize my password

I opened my macbook pro 13.3 last nightt for the first time, when I went to shut down it asked for my password. I entered what I thought was the same password I have for my other coomputer. This morning it won't recognize it. I must have made a keystroke error but there is no way to change it. I can't get beyond the user picture, Shouldn't I have a secodn chance, It's very unforgiving.

You can post in the iPhone forums:
http://discussions.apple.com/category.jspa?categoryID=201
They handle that issue on a daily basis.

Help! I dropped my external HD and now my Macbook Pro will not recognize the drive. I have tried to repair the disk and that does not work. Please offer help, suggestions, something!

I dropped my external HD on my hard tile floor and now the drive is not working properly. I have tried a repair in Disc Ultilies with First Aid with no such luck. It started to work then I got a message "Filesystem verify or repair failed" about 3-4 minutes into the first aid repair disk. When I plug in I get the disk you inserted was not readable by this computer message. Please I need help on restoring this drive!
Its a simple tech pro drive 1TB.

Unfortunately, a drive that has been mechanically damaged by a drop and can't be repaired using Disk Utility probably can't be fixed any other way either. The best you can hope for is to salvage as much data from the drive as possible using one of the data recovery utilities linked below, and then replace the drive.
http://www.prosofteng.com/products/data_rescue.php
http://subrosasoft.com/OSXSoftware/index.php?main_page=product_info&products_id= 1
http://download.cnet.com/VirtualLab-Data-Recovery/3000-2094_4-10298807.html
If you can't recover your most important data using one of these utilities, the only remaining hope is a data recovery service, which is very likely to cost $1000 or more for a 1TB drive.

My macbook pro will not recognize my Seagate external hard drive.

Last night it was working fine, but I noticed that every time I plug in my hard drive there is a bunch of files in my trash bin. I tried to delete them and my trash bin goes into the negatives and never stops. I tried dragging those files from the trash bin into the shredder on mackeeper, but that did not work. I then gave up on trying to delete the files and went to bed. I woke up and now my hard drive does not work. It still glows but nothing comes up on the screen. I plugged it in my brothers computer which is windows and it recognized it (It started to install the hard drive on his computer, so I stopped it). I also recently removed programs/ applications like ichat, garage band, and other applications that I never used on my computer. Just wondering what I need to do to get this to work because all my school stuff is on the hard drive. And I tried a new cable and it still does not show up. Please help.
I guess never mind, literally 25 seconds after I posted this message, all of the sudden it recognized my hard drive. I hope it does not take this long for it to recognize it everytime I use my computer.

I suggest you delete Mackeeper and do not use the Mackeeper uninstaller. Look at some of the discussions on this forum and you will understand that it is at best a nuisance and at worst malware that has a negative impact on the performance of your MBP. Here are instructions that you may use to get rid of it:
http://applehelpwriter.com/2011/09/
Ciao.

My mac had it's original software re-installed by Apple. since they did this, my airbook pro will not recognize my iphone in Itunes, and I cannot update the latest version of itunes, because it says I'm not running the latest version mac software????

I my macbook pro will not recognize my iphone. I had the AppleStore, re-install my original software a month or two ago, but since they did this, my computer cannot recognize my Iphone it is telling me that I also need to download the new version of Itunes, but keeps telling me my system isn't running the correct software. When I go to update my software, it's telling me I'm running the latest version??? HELP!!

you need to upgrade your OSX to 10.6.8 or later to sync with the iPhone 5. as you need itunes 10.7 to run Iphone 5

My Macbook pro will not recognize external devices

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