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boot problem

  1. J

    Help with no boot - white screen

    Hi all, I need some assistance for a reoccurring problem with a iMac 2010. The problem has run through many phases over weeks (beginning with black screen with thin vertical white bars) on start-up, but through finally getting it to boot with a CD and reinstalling the existing OS it appeared...
  2. P

    Powerbook G4 (5,5) Boot Problems

    Hi, I've been working on restoring a couple of late G4 17" Powerbooks (5,5, A1085), and I have one that does not find the drive on a reboot, but finds it OK on a cold boot. (Got these as basket cases so I have no idea about their history). If you reboot from the desktop, you see a flicker as...
  3. ratselttab

    Boot problem help

    https://www.dropbox.com/home?preview=IMG_2895.JPG Hi I have a little problem with my MacBook Pro late 2011, boots perfect from HDD every time but when I try boot from DVD or USB I getting “prohibition” sign :/
  4. O

    Can not book Mac from CD or USB

    Hello, I have a friend with a Macbook Pro (not sure of what month and year) and they consulted me recently to help them out because of a problem they are experiencing. Whenever my friend brought it over, he said that he opened it and saw a blank white screen. He also claims that it is flashing...
  5. RadicalxEdward

    Everything AND Nothing works, any gurus out there?

    SYSTEM: Late 2011 MacBook Pro 15" Mac OS X High Sierra beta Dual hard drives (1x SSD in main bay, 1x HDD in CD bay) PROBLEM: Can't boot past grey screen. Gets halfway through apple/progress bar screen (as above), then goes ALL grey and stays there. Might be connected to beta as...
  6. X

    Macbook Pro Retina Won't boot normally (Please HELP)!

    Hi, IF YOU WANT TO SEE THE PROBLEM IN VIDEO ==> I have a macbook retina (Mid 2015) 15" that does not turn on the normal way it stats and shutdown without any sign in the screen (watch the video please), if i want to turn it on i need to hold the power button for like 7 seconds and even if it...
  7. F

    Mac not Booting up After removing Windows Partition

    Hello Everybody, I am new to the Forum...think ist will be fun... So my Problem: I had windows 10 on an Bootcamp Partition...working Fine no Problems...but recently I decided to remove it since I wasn't really using it. So I tried removing it with Bootcamp Assistant...but the Assistant have me...
  8. tobilele

    MBP won't boot.

    So my mothers MacBook won't boot. I've tried several things I found on Google but nothing solved the real problem. Everything I know is that it's not a hardware failure because if I wipe the hard drive, install OS X again it boots with no problems. Only if i install the Time Capsule backup/ just...
  9. bowlerae

    iMac 2011 El Capitan wont Boot after GPU Replacement

    Hello, A few weeks ago my computer froze while I was using it so i performed a hard reset, after which the computer would not boot. I performed every troubleshoot I found online and got it to boot once successfully in single user mode but after about 20 minutes, my screen did a weird thing...
  10. A

    Resolved Windows installation fail (iMac 27 mid-2011)

    Hi Guys, Problem: Im trying to install windows 10. Since superdrive is failing, i change it to SSD. So installing Windows trough superdrive ODD/ the easy way (bootcamp) is not possible to install. My mac : Model no : A1312 iMac 27 i7 3.4ghz 8gb Ram (4+4) osX - El Capitan AMD Radeon HD 6970M...
  11. pixxelpusher

    Mac Pro 2009 boot problem.. but then it booted?

    Ok so I just had a weird problem with my Mac Pro 2009 that I spent 6hrs trying to fix, but am still confused. What happened was that I wanted to feed a SATA data cable up under the PSU and into the DVD drive cavity (which I have empty) as I'm putting a SSD drive up there and connecting to the...
  12. L

    iMac 2008 not booting

    Hello, My grandad gave me his old 2007 iMac last year, i have been using it since and it works just fine, the only problem is that it can't play back 60fps (stutters ALOT), this is due to the underpowered graphics card (specs below). My friend has an 2008 iMac which he doesn't use anymore and it...
  13. mirzadelic

    Green lines when booting help please

    Hi, I have problem with macbook pro late 2011, i got this problem after latest update, and then i reinstalled el capitan and still same problem. OS gets frozen, and when i force power off on button, and then when i boot again i get green lines when booting: And then only this gray screen...
  14. R

    Strange Mac Mini 2012 Fusion Drive Boot/Formatting Problem

    I'm wondering if anyone else has had this type of thing happen to them and hoping for some enlightenment before I reformat... I have a 2012 Mac Mini quad i7, 16 GB RAM, and a fusion drive (240GB OWC SSD and 1.5TB HDD) I sat down at the machine yesterday morning to do a short simple task and...