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Upon completing data migration to a new macbook air, I restarted the laptop as a part of the process. However, the screen is stuck in the apple logo. Is this step supposed to take such a long time? Its been about 10 hours already.

I have tried forcing a restart and the safe boot start up but its still on the same screen!

Hi GreenchiliNM,
Welcome to the Apple Support Communities! I understand that your computer is only booting to the Apple logo after running migration. You have done a great couple of troubleshooting steps already by trying a restart and trying to start in safe boot. I suggest you continue with the steps in the following article starting with the Reset the NVRAM / PRAM section and working down.
Mac OS X: Gray screen appears during startup
Reset the NVRAM / PRAM
Shut down your Mac. If necessary, hold your Mac's power button for several seconds to force it to power down.
Reset the NVRAM / PRAM.
If the gray screen issue persists, go to the next section.
Thanks for reaching out, 


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powerbooks & powermac   Mac OS X (10.4)   MBP 17" Hi Def 4G 250G HD

I probably should ask this on another forum but I figure someone here can help me and I trust you all with my Mac! And of course it is the weekend so I can't call APC and I'd like to figure this out before Monday if posibble.
The APC UPS item BR1200 that I am considering says it has the following features among many others:
a. Audible Alarms: Provides notification of changing utility power and UPS conditions.
b. Automatic restart of loads after UPS shutdown: Automatically starts up the connected equipment upon the return of utility power.
a. Does anyong know if you can shut off the audible alarms on these products?
b. If the computer is OFF when the power goes off, will it still be restarted when utility power returns?
And, if I shut off the computer successfully when the power goes off and it is running on battery, will it still come ON when the power returns?
Most importantly - is there a way to change these settings?
Mrs H
Here's a link to what I'm looking at:

A search here has shown this topic come up before -- such as at and -- but I can't find a resolution, so I'm bringing it up again.
I have multiple FW drives connected to my MacBook Pro. The MBP is connected to an APC Back-UPS RS 1200. OSX does not make the UPS Energy Saver autoshutdown preferences available on the MBP, the reasoning being that a laptop shouldn't need UPS autoshutdown because it has its own battery which is likely to run for far longer than the UPS would.
That's all well and good for the MBP itself, but it doesn't account for the multiple FW drives which are attached to it for backups and other purposes. In the event of a power outage, without UPS autoshutdown, the UPS will run down, and the drives will abruptly power off, exposing them to potential data loss and damage.
It's also not a solution to suggest that I manually power things down once there's a power outage, because the power can go out while I'm away for more than the few minutes of UPS battery back up time. The only real solution is to have UPS autoshutdown available on all portable machines. Unless and until Apple offers a (surely very simple) OS update to make that happen, I'm still interested in a solution.
APC's own software for autoshutdown stopped being updated long ago, so there is no version compatible with Snow Leopard.
The only potential solution I've found so far is -- but its documentation is overwhelming and it appears that it may need other supporting software, a fair amount of Terminal usage, etc., all making it not very user-friendly for the very simple usage I'd want to make of it.
Does anyone know of any other solutions, software that can run on a MBP to add UPS autoshutdown functionality?
Re: Apcups, is anyone using it successfully on a MBP? If so, does anyone know if the version listed here -- -- is a simple application that I can easily install and configure like regular Mac apps? If yes, then I'll likely be very happy with no need for the following question. If no, can anyone provide simple instructions to set up Apcupsd to do what I want?

I have been doing a lot of work on upgrading two Mac Pro's over the last few days. I have one attached to an APC UPS 1300VA 780W rated. Normally this Mac Pro is under my desk, so I do not here it. During the process of one of the upgrades I had the Mac Pro sitting right in front of me on my desk. As soon as I powered it up, I could hear this disturbing "hum" or "buzz" coming from the power supply of the Mac Pro. However the Mac Pro seemed to operate fine.
I decided to unplug the Mac Pro from the APC UPS and into a regular Tripp-Lite wall surege protector with no UPS. The noise was significantly reduced. Therefore my question to you is:
1. Do you think the fact that the APC is creating the problem or introducing a different signal (maybe not true Sine Wave) than what is required by the Mac Pro?
2. For those that have a newer Nehalem Mac Pro and they have access to the back, how would you rate the "hum"? Is it what you would expect? Now that I have it off the APC UPS, it seems more normal (it is audible, but only with my ear close to it).
3. How well are the power supply units in the Mac Pro designed? Enough to handle immediate loss of power? What about cleaning the power coming in? Sometime the voltage drop across my AC outlet is 110V to 120 V.