Whenever i try to update my macbook pro, it downloads then says I need to restart my computer. I restart the computer, and everything just freezes. When my computer eventually turns back on, its not updated. other apps i try to download dont download also

First, do the following:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard 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. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
When you complete the above re-download your OS X upgrade (not sure which one that is, but I assume Mavericks.) After the download is completed re-install it. Hopefully, this time it will do what you expect.

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Do a reset, hold down the home/sleep button together until you see the apple logo and then release, then wait for the phone to boot back up.

I have updated my Macbook pro to mavericks since yesturday it has been running none stop with a gray screen and the apple logo in the medle

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The startup disk may need repairing ...
Startup your Mac while holding down the Command + R keys.
From there you should be able to access the built in utilities to repair the disk and restore OS X using OS X Recovery

I bought yesterday my macbook pro and I want to join the FaceTime and I just can´t... It said that is not working and try it later... but since yesterday said that .. What should I do?

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Here's a previous discussions that seems to have solved a similar issue in the past:
https://discussions.apple.com/message/12209861#12209861

My iMessage says it needs to be activated but i clicked the link and it already says its been activated...how do i get my imessage to turn on?

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First thing to try is to reset your device. Press and hold the Home and Sleep buttons simultaneously ignoring the red slider should one appear until the Apple logo appears. Let go of the buttons and let the device restart. See if that fixes your problem.

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If you have problems with updating or with the permissions then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.
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* Firefox 4.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html
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Research YouTube's 'How To' video tutorials
FixYa

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I've updated my Macbook Pro and my iMac with Maverick, updating the various apps. On my Macbook, everything functions perfectly. On my iMac, I get the Your System has Run out of Application Memory, and it's based our Mail, the only app not updated. Ideas?

Maverick and Your System message
I've updated my Macbook Pro and my iMac with Maverick, updating the various apps (Pages, Aperture, iPhoto, Numbers & iMovie, too) in the process.
On my Macbook, everything functions perfectly. On my iMac, I get the Your System has Run out of Application Memory message. But it's not Calendar, it's Mail that not only won't open, but when it does now, it takes the entire system out with it.
I open Safari, and it works. I open Firefox, and it works and Safari still works. I open Calendar and it works, Safari and Firefox continue to work. I open Reminders, and everything still works.
I open Aperture, and it opens Finder instead, showing the 3.5 update that was installed two days ago (and Aperture has functioned), but doesn't seem to update the app; after about 20 seconds the update disappears and I can now open Aperture and it shows I'm now opening the updated Aperture, which it didn't show before.
I click on Mail, and the cursor spins for ten minutes. The mail window finally opens, but the cursor spins and does not connect to upload new mail, and I finally Force Quit Mail. Since the Maverick update, even though Mail was not updated (and maybe because Mail was not updated), I have been able to receive emails twice, and then the program crashed.
Besides the Aperture app, Pages didn't fully update on the iMac, and I had to remove the old Pages icon from the dock after the new program loaded up from Applications.
Any ideas?

Maverick and Your System message
I've updated my Macbook Pro and my iMac with Maverick, updating the various apps (Pages, Aperture, iPhoto, Numbers & iMovie, too) in the process.
On my Macbook, everything functions perfectly. On my iMac, I get the Your System has Run out of Application Memory message. But it's not Calendar, it's Mail that not only won't open, but when it does now, it takes the entire system out with it.
I open Safari, and it works. I open Firefox, and it works and Safari still works. I open Calendar and it works, Safari and Firefox continue to work. I open Reminders, and everything still works.
I open Aperture, and it opens Finder instead, showing the 3.5 update that was installed two days ago (and Aperture has functioned), but doesn't seem to update the app; after about 20 seconds the update disappears and I can now open Aperture and it shows I'm now opening the updated Aperture, which it didn't show before.
I click on Mail, and the cursor spins for ten minutes. The mail window finally opens, but the cursor spins and does not connect to upload new mail, and I finally Force Quit Mail. Since the Maverick update, even though Mail was not updated (and maybe because Mail was not updated), I have been able to receive emails twice, and then the program crashed.
Besides the Aperture app, Pages didn't fully update on the iMac, and I had to remove the old Pages icon from the dock after the new program loaded up from Applications.
Any ideas?

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I was wondering, does anyone have an idea on how to update my Macbook Pro 15" to Mountain Lion's 10.8.3 from Mountain Lion's 10.8.2 version? When I attempt to use the App Store, it will restart my computer but it will not install the update. The update also still shows up in the App Store as available and when going to "About my Mac," it still shows the current version being 10.8.2.
Computer:
Macbook Pro 15" Aluminum Body
Purchased Late 2008
Current OS: Mountain Lion 10.8.2
Original OS: Leopard

I will be attempting this fix this fix tonight:
https://discussions.apple.com/message/21529499#21529499

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Have you tried - in Mail go to the menu Mail > Preferences.
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Close the Preference Pane.
MtD

I got an iphone 4. I had to update my macbook pro to Lepard just to sync. I updated to lepard. Now when I try to sync itunes does not recognize my new iphone 4 as mine and wants to erase everything I have bought using the phone.

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Nope - you cannot restore a backup from a newer iOS version on to a device running an older iOS version. The reverse works, but in your case to use your backup, you must update to iOS 7.0.3 - no other option if you want to use that backup.

Whenever i try to update my macbook pro, it downloads then says I need to restart my computer. I restart the computer, and everything just freezes. When my computer eventually turns back on, its not updated. other apps i try to download dont download also

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