Hi guys.

Like many others, I bricked my ATV trying to install Mac OS. Fortunately, I previously made an dmg image of ATV hd using Disk utility on my Mac book pro (hereinafter MBpro) and stored it on MBpro’s desktop. Please, can anybody explain to me, as to the 5 year old kid, how to recover my ATV hd using said dmg image? Please don’t use terminology like dd this, bless that etc., cause I don’t even know what dd and/or bless means. I would really appreciate a simple guide for dummies, i.e. could you please speak plain English, like go there choose that from so and so menu etc.
P.S. I have my ATV opened and can connect original 40g hd to my MBpro through the USB hub.
Thanks.

If I can't use terminology like dd this, bless that, then I can't help you. Sorry, you will have learn the terminology. There is no "download this and run it" solution.

DAVILLA
What i meant is that it is not enough for me, and I believe to many others, just to say do dd or bless that. I need more detailed guide as to where to go and what to do. For example, where that dd and bless should be done? Is that in terminal or elsewhere? So i meant please be specific, don't just throw some terms(even if you think they obvious) without explanation as to how and where that has to be done. Unfortunately it is not as obvious for newbie like me.
Thanks

If you previously made an dmg image of ATV hd using Disk utility, then you need to restore that disk image to the ATV hd using Disk utility. Should be self explanatory. No need for dd or bless.

But Disk utility cann't't see and/or restore one of three of the original partitions. Just "OSboot" and "media" can be restored but not that 2s3 or whtever it called. It says it cannot read it.

Then you will have to learn and understand how to use "dd".

dd if=yourdiskimage.img of=/dev/diskN bs=1024k

where diskN is the disk number of the AppleTV disk attached to some OSX host.

That's what happened:

dd: /Users/a/Desktop/FUJITSU MHW2040AT Media.dmg.img: No such file or directory
as-macbook-pro:~ a$ dd if=/Users/a/Desktop/FUJITSU\ MHW2040AT\ Media.dmg of=/dev/disk2 bs=1024k
dd: /dev/disk2: Permission denied

two things;

1) "/Users/a/Desktop/FUJITSU\ MHW2040AT\ Media.dmg" is not the path to Media.dmg so dd can't find it. Is your username really "a"?

2) "Permission denied", in order to use dd you must have elevated privileges. You do this by prefixing the dd command with "sudo", enter your password when prompted. This of course assumes that user "a" has admin privileges. "sudo dd ....."

davilla
1. I think you missed something. The pass is appear to be correct, i actually copied it from that dmg icon name itself and pasted in to the dd string. As you can see dd can't find it only when i'm adding that <img.> after dmg. in to the string. If you look carefully those two strings are differ only to that respect.
2. That is the thing, i don't have any password neither on my Mac book pro, nor on ATV hard drive (FUJITSU MHW2040AT) which i'm trying to recover. However, ATV hard currently appearing in finder as "unknown" because it does not have any system/partitions installed because i erased everything from it by using Disk utility "Erase" bottom. So, now in finder it shows as "unknown". Could that be a reason why permission denied? If yes what should i do with it?

1) I can't see anything I'm not next to you so can only comment on what the errors mean. If the error says "No such file or directory", then a) the path is wrong or b) there is no such file. Not more to say here.

2) "i don't have any password neither on my Mac book pro", you are screwed. The default install of OSX requires user accounts have passwords. Not sure how you did is. Without a password, you can't be in the admin group and be a sudo user. Without sudo, you can't use 'dd'. And without 'dd', you can't re-image the atv disk. End of story. Your MacBookPro install is borked and I bet lots of other things don't work quite right either.

Sorry can't help further. What you want to do requires a fully working OSX system. Yours is borked. Either that or boot a Linux livecd and try from there. "dd" works the same, device names are different.