Desktop device locked remotely though iCloud: how to unlock

[bowie20963]

Hello everyone, I've inadvertently locked my office desktop from my home computer using iCloud and now I don't know how to unlock it, remotely that is!
Please help!
Yours truly,
Mac Idiot

 

[iConnected]

Is this any help?

"Turn off Lost Mode or change your contact info

You can turn off Lost Mode by entering the passcode on the device, or by following the steps below. You can also follow the steps below to change the contact information displayed on your lost device.

If your credit and debit cards for Apple Pay were suspended because you put your iPhone 6 or iPhone 6 Plus in Lost Mode, when you turn off Lost Mode and sign back in to iCloud, you can resume using your cards.

Go to Find My iPhone on iCloud.com.

If you don’t see Find My iPhone on iCloud.com, your account just has access to iCloud web-only features. To gain access to other iCloud features, set up iCloud on your iOS device or Mac.

Click All Devices, then select the device that’s in Lost Mode.

Click Lost Mode, then change the information or click Stop Lost Mode. "​

https://support.apple.com/kb/PH2700?locale=en_US

 

[bowie20963]

I got a bit confused (again!), as I didn't know it's called "lost mode" for recent OS, my home laptop is on OSX 10.6.8 and it displayed "lock".

Anyway, I have tried what you suggested but the locked device icon on iCloud is partly available, only "play sound" is visible, so can't "stop the lock mode".

I guess there is nothing I can do from here, so thank you very much for your help.