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A dead or dying PRAM battery can prevent a Mac from booting or cause erratic behavior. If the date and time reset each time you unplug the Mac you need a new PRAM battery. I enter the correct (and Yes, I am sure it is the correct password for that AppleID).Macs also have another battery, called the PRAM (or NV-RAM) battery, that saves things like network settings, choice of startup drive, etc. When I click 'update', I am prompted to give the password for the Apple account the App was bought with (the same account as I am currently logged into the Mac AppStore with). There is now an update to one of my Apps (Twitter).Power Apps for Windows app may crash if you open an app that uses a camera control.Sometimes a Mac will power on but the hard drive will squeal, whine very loudly or make ticking sounds. Camera controls in Power Apps for Windows app. For smooth drawing, use a pen or run the app in a browser.Such are the workings of UNIX.What this means for us mortals is that when a Mac stalls at the Apple logo or the logo with a spinning gear, it probably has a corrupt Mac OS X installation. Shortly thereafter it transfers command to the almighty (and controversial) launchd process. You can also try Apple Disk Utility or another third-party utility like TechTool Pro or Drive Genius to try to repair the disk. If the drive is OK after repairs but the Mac still won’t boot, do an Archive & Install of Mac OS X to replace the operating system.When the Apple Logo appears your Mac has found a valid system disk, and Mac OS X begins loading.Once the spinning gear appears the BSD kernel (Darwin) has assumed command and begins loading device drivers. This can indicate a corrupt installation of Mac OS X or a failed (or failing) hard drive.A pass through the excellent DiskWarrior utility is highly recommended for any disk-related startup problems. Leaving a failing drive struggling too long can cause further damageHave you recently changed your password Were aware of some problems with Apple devices (iPhones, iPads or iPods) where youre unable to send emails after.Flashing question mark with folder, or circle/slashThe flashing question mark or a circle/slash means your Mac can’t find a valid startup disk. Sometimes switching on/off a few times can help, but don’t push things under these circumstances.Mac blue screen or blank desktopAfter the Operating System has finished loading the loginwindow process manager takes over and deposits you at your desktop. If that doesn’t work, an Archive & Install may be needed. DiskWarrior is also worth a shot (this is by far my most used disk utility).
My Power Email App Wont Send Pictures And Keeps Ag For For Update To OneOnce the installer begins you can run Disk Utility (from the Utilties menu) or perform an Archive & Install. Boot Mac from another drive to troubleshootIf your Mac has an optical drive ( aka SuperDrive – most do) you can boot from an Apple software install CD or DVD – insert your disc, restart and hold down the C key. More good info about kernel panics can be found at The-X-Lab. If that doesn’t work try disconnecting peripherals, removing RAM, PCI cards, etc. Thanks for your guidance.Adam Rosen – Submitted on 0 at 12:40 pm | In reply to Ian.Ian – I’ve seen similar problems with that SATA cable to the logic board on Apple laptops, so yes that’s a possibility. That’s usually about a couple hundred dollars (US) to replace, parts and labor.To follow up, just heard from the repair shop. OLD COMMENTS ARE REPOSTED BELOW (LOST AFTER SWITCH TO DISQUS):Kacey – sounds like you have a bad hard drive. More tips and suggestions?I’m sure there are many other tips and suggestions on the topic of Mac startup problems please let us know some of your ideas and experiences in the comments. For more details see How (and Why) to Clone Your Mac Hard Drive. This not only allows you to check, fix or copy data off the primary boot drive but continue working immediately when you have disk problems. No problems until Sunday morning. I have a 14 mo old MBP 13″ (June 2009). Since you know the disk is good, worth replacing the HDD cable next (it’s cheap) and see if that works.Impeccable timing. Force quit wouldn’t work so I held down the power button. I was in for about a minute and then it froze. Same thing happened when I launched Safari. I was able to log in and clicked on Mail icon. Upon mounting a new drive (WD 500G 5400 rpm), it couldn’t find that drive either. Apple “genius” said the HDD was bad. I tried safe mode and couldn’t get past this:SATA WARNING: Enable auto-activate failed.Stil waiting for root device (in perpetuity)I tried booting from the install DVD and no luck either. Outlook for mac address bookIt is a little over a year old and I do not have a valid warranty. Does this sound accurate? If the logic board truly was bad, would I be able to do anything whether the drive was mounted interal or externally? Thanks.The “Flashing Question Mark with Folder, or Circle/Slash” is what occurs when I attempt to turn my macbook on. He said either the cable from the HDD to the logic board was bad or the logic board was bad. At all! was fine last night, but this morning nothing … black screen, no sounds, no movement … the power plug is in and green … (this is less than a year old, and yes, we will use the warranty to replace, and my husband is a techie, but not home at the moment)Any advice for today so she can at least try to do something … your advice and/or thoughts would be most appreciated!Karen – it sounds like your user account is corrupt. I suggest you take the laptop to an Apple Service Center.Jill herlands – Submitted on 4 at 11:45 amMy daughter’s laptop will not start. Why is this happening so randomly? What is actually wrong and how much do you think it will cost to fix?Jill – you’re likely looking at a hardware problem, possibly bad motherboard. We tried changing the password but it makes no difference. When I try to log in it goes to the page with Finder in the menu bar and then 2 or 3 seconds later goes straight back to the login page whether or not I click with the mouse or try using the keyboard. We have an iMac7,1 with Intel Core 2 Duo and System Version: Mac OS X 10.4.11 (8S2167). I still get a grey screen – no logo. Now I find out tomorrow how serious the issue I have to pay for is.Tom – I’d bring the Mini to an Apple Service Center for evaluation.I tried to run off a USB drive without the Hard Drive or Super Drive attached. Mac repair guy said… oh you saw the kernel panic before the problem? I wasnt aware of what it was called.
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