Stalling during power on

I work at a school and have been updating our macbook pro lab, some of them now are basically stalling during startup. it only loads half way. i've done internet recovery, checked the hard drive it says 'updating boot support partitions for the volume as required. I'm not sure where to go from here

Hello marissa_erickson,
Welcome to the Apple Support Communities!
I understand that some of the computers in the computer lab are not starting up as expected. You have also completed some good troubleshooting already. In this situation, I would recommend a few more steps. Please follow the outlined steps in the attached article to help isolate and resolve this issue.
Mac OS X: Gray screen appears during startup - Apple Support
Have a great day,
Joe

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Hello Tom,
I am sorry to hear you are having trouble with PocketMac.
Is any data syncing between the Mac and BlackBerry?
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have a great day!
Steve Z.
Technical Support Engineer
PocketMac Support Team
http://www.pocketmacsupport.com
http://www.pocketmac.com
Message Edited by tozbolt on 01-09-2009 11:32 PM

I have gotten my BBStorm to sync partially once, since then the pocketmac seems to be pretty worthless. I have un/re-installed and am getting the same results. Now, there is a new problem...the pocketmac "unexpectedly quits" and makes it to the same point each time. I have moved past the "stalling" and on to just flat out quitting.
I might take my mac's approach and just get an Iphone, quit this whole Crack-berry thing.
PLEASE HELP!!!!

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