Help!! iMac Won’t Boot!

Vado

macrumors member
Original poster
Dec 30, 2016
65
22
Livingston, United Kingdom
My late 2013 iMac has decided to stop working on me. I restarted after noticing some sluggish performance and now it will not boot back in to macOS at all.

Specs
Late 2013
27”
3.5Ghz i7
32GB RAM
1TB Fusion Drive
4GB GeForce GTX780M

I get the normal boot chime and Apple logo with boot status bar but it’s going incredibly slowly. If I leave it for awhile the boot status bar does eventually go white but macOS doesn’t load. On one occasion it the status bar did load but all I got was a black screen and a beach ball.

I’ve tried:
  • Booting into Safe Mode
  • Booting into Recovery Mode
  • Booting into Internet Recovery Mode
  • Resetting SMC & PRAM
All unsuccessfully

I’ve also tried booting in Verbose and Single User Mode. When booted in Verbose the screen was moving quickly with text, so couldn’t get a photo on my iPhone but it was reporting corruption to files :(

This is a photo from Single User Mode boot, again mentioning corruption to files.



Everything I’ve tried so far has been unsuccessful to get it to successfully boot.

Anyone have any ideas?
 

Fishrrman

macrumors P6
Feb 20, 2009
17,442
5,654
It seems to me that even if the internal drive failed, you should still be able to start up in internet recovery mode.

Do you have access to another Mac?
If so, try connecting the two via USB and see if you can get into "target disk mode":
Boot the 2013 iMac first and IMMEDIATELY hold down the "T" key and keep holding it down.
Do you get the "target disk" symbol?

If this doesn't work, the next thing I would try is to use an external drive with a copy of the OS on it that is FULLY BOOTABLE TO THE FINDER (tm backups cannot do this).
This ought to give you a boot even if the internal is dead.
 

Vado

macrumors member
Original poster
Dec 30, 2016
65
22
Livingston, United Kingdom
Managed to find a well reviewed local independent repair shop. They are going to remove the fusion drive (both mechanical and 128GB SSD) and replace it with a 1TB PCI-E SSD blade.

That will see me through until I decide to upgrade my iMac.

Once I get it back I’ll just restore from my Time Machine backup.
 

BrianBaughn

macrumors 603
Feb 13, 2011
6,365
938
Baltimore, Maryland
Managed to find a well reviewed local independent repair shop. They are going to remove the fusion drive (both mechanical and 128GB SSD) and replace it with a 1TB PCI-E SSD blade.

That will see me through until I decide to upgrade my iMac.

Once I get it back I’ll just restore from my Time Machine backup.
I think you'll get multiple years out of that.
 
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Vado

macrumors member
Original poster
Dec 30, 2016
65
22
Livingston, United Kingdom
I think you'll get multiple years out of that.
Thats the plan! Won’t be looking to upgrade my iMac unless Apple brings a compelling performance upgrade and major redesign.

Plus I’ve now got a nice 128GB SSD (providing that’s not what has failed) that I can buy an external enclosure for and have a nice external storage drive.

If that happened I would hope that the money I’ve spent on this upgrade will add value to any sale.