I updated my Mac and now it won't start back up, it's frozen on start up

I Updated my Mac with the recommended updates and when it restarted it froze on the start up .

Hi
Have you tried any of the suggestions detailed in the link below?
Good luck
http://www.macworld.co.uk/news/mac/steps-take-when-your-mac-wont-start-3423817/

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Help I have accidentally deleted the var folder on my mac and now it won't start up what should I do?

Plz help
Help I have accidentally deleted the var folder on my mac and now it won't start up what should I do?

Reinstall OS X.
Reinstall Snow Leopard without erasing the drive
1. 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.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Reinstalling Lion/Mountain Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. 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 main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

Plz help Help I have accidentally deleted the var folder on my mac and now it won't start up what should I do?

Plz help
Help I have accidentally deleted the var folder on my mac and now it won't start up what should I do?

/var is a hidden folder, so you mustn't remove the folder.
The only solution is to reinstall OS X. If you have OS X Lion or Mountain Lion, use OS X Recovery > http://support.apple.com/kb/HT4718
Hold Command and R keys while your MacBook is starting and reinstall OS X. You won't lose anything. If you have a backup, you can restore it after starting in OS X Recovery instead of reinstalling Mac OS X, so you will save a lot of time

I have just updated my phone and now it won't turn back on. The display is currently black with the apple logo and a lot of sentences in white writing at the top all starting [NAND]????? what can i do to fix this?

I have just downloaded the new update and now my phone wont turn back on. The screen is blank with this across the top on the page:
[NAND]_findflashmediaandkeepout:601 physical nand blcok offset1......... (several more sentences similar to this saying error etc)
This happened before when the battery went dead and i plugged it in to charge, but started working again after a while. This time however its not doing anything.
HELP!

Might be hardware failure. Take the iPhone to the nearest Apple store
for evaluation. Make a Genius Bar appointment to avoid delay at the store.
Make a Genius Bar Reservation
http://www.apple.com/retail/geniusbar/

I updated my Ipad2 and now it won't start

I updated my ipad2 on Sept 2014,and now the screen only shows the apple logo, but I can't turn it on. Any help?

Hi
Have you tried any of the suggestions detailed in the link below?
Good luck
http://www.macworld.co.uk/news/mac/steps-take-when-your-mac-wont-start-3423817/

Mountain Lion update, and now computer won't start up?

Writing this for a friend, as his computer is inop at the moment. Hence this message.
He has a new 27" iMac. He upgraded to Mountain Lion a few weeks ago, and then had intermittent problems with apps unexpectantly shutting down.
Now he did a ML update this morning, and his computer won't start up. It gets to the point of the Apple logo coming up, a progress bar, and then the spinning wheel, but then shuts itself down right afterwards.
A safe boot yields the exact same result.
Any thoughts out there on what he could try to get it up and running again?
Thanks much for any and all help.

Thank you for the fast response.
He was able to get into Disk Utility with the Command and R keys, but when he tried verifying the disk, in red it said 'Invalid Node Structure, volume could not be verified completely'.
He went ahead and verified it anyway, then proceeded to repair it. Howver, it stopped repairing, said it cannot repair, and that he should back up files and reformat the disk.
How can he back up his files? He cannot see a way to do it. Is there anything else he can do besides having to reformat the disk?
This is his first Mac (after much prompting from me to go Mac), and he's afraid he's now lost everything on there.

I just updated my pages and now it won't load. This is on my iPad. The first version which has the latest version it can have 5.1 or something like that. I am trying to open a document and am worried that if I uninstall and reinstall I will lose all my do

I just updated my pages and now it won't load. This is on my iPad. The first version which has the latest version it can have 5.1 or something like that. I am trying to open a document and am worried that if I uninstall and reinstall I will lose all my documents

I just uninstalled it and am waiting for it to reinstall. I sincerely hope that I have not lost everything that I worked on so hard. Now that mobile me is gone, I have not been able to go between devices to transfer things. I was merely trying to take a document I had worked on and open it in pages, but it said my version was too old. When I updated, it wouldn't load. Now I cannot do anything. I hope that the reinstall fixes it without losing everything. Please advise!!! Yes, I am in panic mode.

I updated the maverick and now mail won't open at all

i updated the maverick and now mail won't open at all

Have you tired opening it from the Applications folder?
What happens when you try to open Mail?

I tried to update my 4s and now it won't work. Is there anything I can do? It's only 6 months old..

I tried to update my 4s and now it won't work. Is there anything I can do? It's only 6 months old..

Yes, connect to your computer with the latest version of iTunes installed and restore it. If it doesn't show up in iTunes when you connect it see: http://support.apple.com/kb/HT1808

I updated my ipad and now it won't connect to a server

I updated my ipad and now it won't connect to the server???

had it ever been jail broken

HT201210 I tried to update my iphone and now it won't work at all

I tried to update my iphone and now it won't work at all

Yes, connect to your computer with the latest version of iTunes installed and restore it. If it doesn't show up in iTunes when you connect it see: http://support.apple.com/kb/HT1808

TS1702 I updated song pop and now it won't work

I updated song pop and now it won't even open the page

Try the basic steps?
Quit the app completely and restart the iPad. Go to the home screen first by tapping the home button. Double tap the home button and the task bar will appear with all of your recent/open apps displayed at the bottom. Tap and hold down on any app icon until it begins to wiggle. Tap the minus sign in the upper left corner of the app that you want to close. Tap the home button or anywhere above the task bar. Restart the iPad.
Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.
Or delete the app and reinstall it. Tap and hold down on the app icon until it wiggle then tap the X on the icon to delete it. Tap the home button when done. Download the app again.

My Mac book pro shut down after getting a low battery message, and now or won't start at all. It's plugged in now and nothing, no fan, no chime when I hold down the power button

My Mac book pro shut down after getting a low battery message and now it won't start. Any ideas?

Hey Citrinesky,
Thanks for the question. I understand your MacBook Pro is not responding. The following resource may provide a solution:
Troubleshooting: My computer won't turn on
http://support.apple.com/kb/TS1367
Thanks,
Matt M.

I have tried to update from Leopard to Snow Leopard using disk. New OS wouldn't load and now laptop won't start at all

I have tried to update from Leopard to Snow Leopard using disk. New OS wouldn't load and now laptop won't start at all. Simply get the Apple logo and the clock below and then after about 10 mins the laptop switched itself off. The Snow Leopard disk is a brand new family edition. Error message when attempting to install was that "this software cannot be installed on this disk".

Thanks Fred, but I've tried '''ALL''' that already.
I '''THINK''' I might have found the problem - the Profiles folder has been locked by inherited properties from the levels above. I have had to go all the way up to my User folder and reset ALL the properties from there down to be unlocked so that I could remove the prefs.js file so that it could be recreated on the next launch of FF. Exactly why my User folder is locked in such a way as to stop me/FF making changes when I have been able to alter preferences at will in the past, I don't know ...
So far, so good. I have since done a complete shutdown and when I restarted this morning, FF seems to be behaving itself ...
flashfletch

My iphone 4 turned off and now it won't turn back on I've tried charging it and plugging it into my computer but it's still a blank screen. please help me.

my iphone 4 turned off and now it won't turn back on I've tried charging it and plugging it into my computer but it's still a blank screen. please help me.

Intel-based Macs: Resetting the System Management Controller (SMC)

I updated my Mac and now it won't start back up, it's frozen on start up

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