Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

start up issues

  1. S

    Intel MBP 2017 cannot find disk and boot unless I do it in clamshell mode via external monitor

    Hello everyone, I own a mid 2017 13 inches MBP. Used it for years without any issue. For the last 2 years, I started using it with an LG monitor connected to it via USB-C, with the laptop in clamshell mode. I would usually plug the UBC-C cable to my MBP (closed) every morning and it would...
  2. ZNDK

    MP 1,1-5,1 Startup problems on OpenCore-using cMP 2009

    The first time(first step) the apple mark progress bar is displayed abnormally, the apple mark itself seems to be in the normal position, but the progress bar is displayed at a much lower position. In this state, the progress bar stops at around 4/5 and does not move forward from there. Recovery...
    • ZNDK
    • Thread
    • cmp 2009 macpro 2009 monterey opencore opencore legacy patcher start up issues ventura
    • Replies: 5
    • Forum: Mac Pro
  3. J

    MacBook Air mid 2011 11'' stuck on white screen, no key combination works

    Hello! I was working on my laptop and suddenly a kernel panic (that's how it's called on forums) happened (with those chinese characters that demand an instant restart) and then my mac restarted. Then it took too long (around 10 min) for booting (showing apple icon and the loading bar properly)...
    • juledd
    • Thread
    • high sierra kernel panic mac not booting macbook air 11 inch safe mode start up commands boot commands start up issues white screen of death
    • Replies: 1
    • Forum: Mac Basics, Help and Buying Advice
  4. ZNDK

    MP 1,1-5,1 Mac Pro can no longer boot. Help.

    I can no longer start Mac by pressing the power button. I am using a Mac Pro 2009 (OpenCore+macOS12).I tried to change video card from RX580 4GB to RX570 8GB. Immediately I tried to install it. But I could not push it in about 10mm left against the slot. I successfully inserted it and tried to...
    • ZNDK
    • Thread
    • mac pro (2009) start up issues
    • Replies: 46
    • Forum: Mac Pro
  5. J

    iMac question on internal hard drive.

    Now, first of all- I want to start off by saying I am new and do not know how to use the site but I am in desperate need of help. I have an iMac that me and my family have been using for a while. I have the iMac Aluminium Unibody, I don't know what model number it is- I just know it is that one...
    • jazvillaz
    • Thread
    • hard drive imac imac (27" late 2009) internal drive internal hard drive memory start up issues troubleshoot troubleshooting
    • Replies: 5
    • Forum: iMac
  6. Camicia

    MacBookPro 11.3 doesn't start unless power is pushed for ~8 secs,kernel_task high CPU, fresh install

    Hi, I am pretty sure this is not a new problem. I hope that somebody has seen it before and hopefully they have some recommendations. What can I try next? The problem: In order to start my MacBookPro Retina( 11,3 - Late 2013 ) I need to keep the power button until the chime sound is...
    • Camicia
    • Thread
    • battery high cpu kernel_task sleeping mode slow computer start up issues
    • Replies: 6
    • Forum: MacBook Pro
  7. 1

    Macbook Pro 2011 issue

    Hi guys about a year ago I encountered the gpu issue that is found in 2011 mbp. I followed the steps that disables the amd chip and it worked, but now im facing a new issue. My mbp turns on but Screen is completely black, no backlight either. No chime. No keyboard backlight. SMC works but...
    • 1024KB
    • Thread
    • black screen black screen startup boot chime gpu failure issue macbook pro macbook pro 2011 start up issues
    • Replies: 8
    • Forum: MacBook Pro
  8. A

    "Exotic" error on macbook 2009, takes 9 hours to start but used to work, now it freezes on login

    So I own an old macbook pro from 2009. Ram has been updated once, otherwise standard hardware (not SSD harddrive, if those were an option back then). For about a year, it has suffered a really strange problem which is that it takes about 9 hours to start. I am not exactly sure how long it...
  9. S

    Macbook not working after being wiped

    Hello, I have a 2015 15" MacBook Pro with Retina display. I am trying to sell it after upgrading to a new MacBook. I wiped followed the procedure of signing out of everything that I needed to. I then proceeded to wipe the drive and this is where it all went wrong. I have done this before and...
    • Sarabee
    • Thread
    • high sierra macbook pro start up issues
    • Replies: 4
    • Forum: MacBook Pro
  10. Jane8798

    Issues copying MacHD to external drive

    So my Mac will not start since I installed the latest sierra update- it only shows the loading start-up screen for HOURS. It won’t start in safe mode or cmd v mode either. I’ve managed to get it in recovery mode and reinstalled sierra and it’s still the same, I’ve also used first aid on disk...
    • Jane8798
    • Thread
    • disk utility hard disk hard drive hard drive advice imac mac recovery mode start up issues
    • Replies: 2
    • Forum: iMac
  11. O

    iMac G4 won't boot, fan twitches

    Alright guys, so I'm having some troubles with an old flowerpot iMac. About a month ago I knocked a glass of water on the desk where the computer is sitting. There was no splash to speak of, the water just spilled around the base of the iMac. I immediately pulled the plug, but didn't feel like...
    • Oblak
    • Thread
    • boot fail imac g4 start up issues water damage
    • Replies: 9
    • Forum: PowerPC Macs
  12. C

    MacBook Pro takes days to boot

    Please help! I believe this all started after an update, but I'm not sure. I believe I am now running Sierra, but I can't get in to confirm... My MBP began running very slowly one day. I noticed all of the memory was being used and tried to restart the computer to figure out the problem. The...
    • Courtneyferg
    • Thread
    • boot freezing frozen start up start up issues startup
    • Replies: 4
    • Forum: MacBook Pro
  13. D

    Macbook Pro Startup Issues

    Hi, bit of a Mac novice here but I'm hoping someone can help with this. When I turn on my Macbook Pro it flashes a No Entry sign and then a Folder with a question mark in it. I've attached images. After doing this for a while it just turns off. Any idea how to resolve?
  14. N

    Laptop won't start up

    On powering up, a kind of green, slightly pixelated Mac icon and boot up progress bar appears. It takes forever for the bar to finish then the screen goes to not pure white but kind of a magenta toned white, then it goes to black then the whole thing starts over again. I've tried holding D...
  15. kubo.siska

    Display problems

    Hello, I am experiencing something very strange with my iPhone 6 (iOS 10). It restarts constantly and there seems to be some kind of stripes of different colors as depicted in the attachment. Also, there appeared some text during the system start-up. Can you please help me with this?
    • kubo.siska
    • Thread
    • display lcd screen start up issues
    • Replies: 5
    • Forum: iPhone
  16. A

    MacBook Pro start up issues (after power outage)

    MacBook Pro 2012, (2.5Ghz, i5), Mac OS 10.12 Was working fine, regularly booted up and ran fine. Was completely shut down (not sleeping), left connected to a charger which was plugged into a surge protector. Some time while we were out there was a power outage. The next day (after the power...
    • ActionClaw
    • Thread
    • boot up problems magsafe dim led power outage reset smc start up issues
    • Replies: 0
    • Forum: MacBook Pro
Top Bottom