Chosen Solution

iMac Intel 27" EMC 2639 (I don’t know the EMC 2639 I can’t access my computer)

It’s just stuck there. I can’t escape the loading at all. I tried finding solutions online to my similar problem, but they don’t work I tried every thing! Please help, I need this for school. Edit:

I tried using other methods of helping my computer. I unplugged the computer for one try (it didn’t work..) but it loaded all the way here. The thing is, it’s stuck here now!

  1. Try booting in Safe Mode by holding down the Shift Key on startup.
  2. Boot up holding down the Option key and select the Repair partition and run Disk Utilities.

Hopefully you have a friend who has a Mac. Instead of trying to connect your system to another Mac, you’ll need to setup a bootable USB thumb drive to boot your system up from so you can checkout your internal drive. You’ll need a 32 GB USB thumb drive and working from your friends system follow this guide: How to create a bootable macOS Sierra installer drive. Then plug in the USB thumb drive and hold the Tab key when you get the bong or if its turned off when the Apple logo shows up. This will take you to the Boot Manager to select the the USB drive. Then let your system boot up. As the USB interface is not as fast as your internal connection it will take a bit of time. Once started you’ll want to go to the menu bar and select Disk Utility to test your internal drive. You might be able to gain access to the drive. If you can you might want to try to salvage what you can onto a second USB drive using a different USB port (don’t pull the booted USB drive). Let us know how it goes.

This happened to my late 2012 27”. Took it to Apple store and was diagnosed as a dead hard drive. It needs to be replaced.