iMac hard drive has failed.. can I retrieve my data?

TruthMac Said:

"iMac hard drive has failed.. can I retrieve my data?: iMac hard drive has failed. Is it any way to retrieve data. I’ve used multiple online data recovery softwares with no success. Mac gives me a 4sns failure th00 - 9.00. Thermal sensors hard disk. It’s either the sensor hard drive or logic board. My main goal is data retrieval from the inoperabledisk. Please help"

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A. Use Disk Utility:

Indeed it seems your hard drive has failed, but try running First Aid in Disk Utility. Fist Aid will fix items, if possible.

1. Boot: in to Recovery Mode [hold down: command + R keys[ upon boot
2. Go To: Disk Utility
3. Select: Hard Drive
4. Click: First Aid button (top-left of window)

B. Log into iCloud:

See if they reside in iCloud.

Go Here: https://www.icloud.com

TruthMac Said:

"Verify and repair permission buttons are greyed out. So that doesn’t work. If any other suggestions feel free to let me know. I also tried mounting the drive using another Mac to no avail."

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A Few More Thoughts:

A. Use Terminal in Recovery Mode:

You could try a few commands in Terminal

B. View The Disk:

1. Boot: in to Recovery Mode [hold down: command + R keys[ upon boot
2. Go To: Utilities Menu on the top of the screen
3. Select: Terminal
4. Use this Command:

diskutil list

C. Try this Link:

Use the Disk Number from the above step on this link: Mac OS X Utilities via Terminal - Git Hub

do you have a Time Machine backup disk?

if no, bad luck

try calling apple support

You may have gotten lucky this time, however not backing up any computer is irresponsible and is a 100% guarantee you will lose data. Get yourself an OWC Mercury Elite Pro and use Time Machine.