gz is a gunzip file extension usually associated with unix.

Ok, I have downloaded gzip, and I am still not able to extract the ISO from the gunzip file.  I even re-downloaded the file and still I am unable to extract the ISO.

where did u download it from? I can try it if you want?

Here is the link:

http://www.opensource.apple.com/darwinsource/images/darwinx86-801.iso.gz

Big file. Will take some time. will get back to you when done.

Ok.

hmmm. I got an error trying to compile the cd. I tried "burn at once" which usually works. I think that this image uses DD. This may be a disk partition image or something. Read the following:
http://wiki.osx86project.org/wiki/index.php/Install_On_A_Partition_Simple_And_Accurate

As I suspected, the file you downloaded *is* an ISO image file.     It's named wrong, that's all.

Rename it to darwinx86-801.iso and you're golden.   Use your favorite Cd burning app to roast a CD.

I love it when I'm at work.  FAST internet connection.   Woooooof.

PS: Had the file actually BEEN a .gz compressed file, Winzip and Winrar would have opened it just fine.  :-)

I just re-read your last comment and you already tried burning it and Nero froze.   Hmmmm.   I'm gonna burn my copy, see what happens.

winrar does open it just fine. I get the iso out start to burn and get errors. Seems like iso file is corrupted.

WinRAR and WinZip actually extracted the files to a folder.  I tried burning the file using Nero and it froze.  I also tried gzip to decompress it and it said the the file was invalid.  I just don't have any other ideas on how to go about burning this image, or as Caseybea says, "roast".

I have downloaded the file from both links, twice, and still having the same problems.

no need for any of that. Use undisker...just tried it. It opened the image and allowed me to extract all contents to a sub directory!! pretty cool.

I'm going to try Caseybea solution.  If I use undisker to extract the files and burn it to a cd than I would not have started this thread because I could have used WinRAR or WinZip for that.

Undisker is similar to isobuster--  USUALLY used for extracting stuff from an ISO.   But the procedure I outlined above is using ISObuster to extract the "image" from the ISO file, and generate a NEW one in a raw format that seems to work ok with Nero.    ISObuster can extract the files too of course, but that doesn't give the author what he needs:  The real bootable CD.

According to isobuster, the resulting *CD* is indeed a bootable CD with the entire structure preserved.

And if for some silly reason you still can't get it to work, just email me your address privately and I'll *ship* you the CD I made.    For all of the projects I'm working on at the moment, an Apple-based developer kit is something that well, I just don't have time to play with right now :-)

I just had a look at the URL. Apparently, the server uses gzip online download compression, hence the .gz ending. The download size was threehundred-something megs and when I came back to have a look at it I found a 574 meg file on my hard disk. Not to mention the insane download speed at the beginning :) (Using IE 6 here). However, the file itself seems to be an ISO file, but it violates the ISO 9660 specs in one important point: The first 16 sectors of an ISO file have to be all zeros. In this file, the first sectors contain some (junk?) data, I see strings like "apple partition map" there. I zeroed the first 16 sectors and burnt it to cd and everything looked ok, no problems with burning or using it. My virtual drives would accept the image even with the junk in the first sectors, so this might be hardware-dependent.

Andre- what you did is the same thing I did-- albeit a bit more efficiently :-).    Using the tools I did above, I ended up creating a compliant image :-)

Apples.  Bah.  ;-)

pepsi- were you able to create the CD using my recipe?

I just wanted to add my $0.05 (inflation all around...) about the image file :)

And about Apple: I've seen much worse pieces of "software" from them. Their streaming server (Darwin) comes with hilarious install methods. No documentation on how to set it up and even hardcoded paths... really great :) I always wondered how they could do such great things like the ibooks since I saw that server installation :D

I was joking about the apple stuff-- actually, some of their technology is absolutely astounding.   The fact that I can actually run linux (and DOOM!!) on my iPod mini is a sort of freaky bonus.     They seem to have this roller coaster of technological rollouts--   crappy stuff and/or software, later followed upon by something truly cool.

Caseybea,

  I have tried to use isobuster as you described in your directions.  All I get is the *.bin file, no *.cue.  I am not able to burn the *.bin with Nero.

Ok, I got it now.  In your instructions, you stated to right click on "Session 1", etc...  I believe you meant to say, right click on "CD" then select, "Extract CD <Image>", then "RAW(*.bin, *.iso)".  That worked for me.

Good deal.   Now all you gotta do is burn the CD.  

I used 7-Zip and it worked fine for me