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Mac Mini 2011-2012 w/ Internal Superdrive : SUCCESS !
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Not Sure
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PostPosted: Tue Mar 19, 2013 2:40 pm    Post subject: Reply with quote

Well, this turns out to be quite an interesting project........

So I removed the capacitor, which was sitting in the way, from the main board.

I don't know how the other person who tried this hack with a late 2012 managed to get everything inside the enclosure without doing this because I am 100% sure this capacitor was sitting in the way.

Funnily enough the mac seemed to work (gray screen with folder "?", as I had the HD removed) even without this capacitor.

That I did not expect.

Nevertheless I soldered a 39u capacitor with long terminals (which I put through some heat shrink tubing) onto the board to replace the original smd capacitor.

This replacement capacitor had a diameter of 4mm.

Now everything fitted into the enclosure.

Next up I tried to insert a disk with a view to install an OS onto an external HD.

No joy the drive would not swallow the DVD.

First I thought this was an alignment issue because it felt like it was a bit too much effort to push the HD in.

So I disassembled the mini and put the stuff together on my desk without the enclosure.

Same problem, drive did not want to swallow the DVD.

So this is NOT an OS issue but a firmware issue.

I took the UJ167 and hooked it up to a PC. It swallowed the disk just fine so the drive is OK.

Because this PC did not have an OS, I now could not eject this disk.

I connected it to the mini expecting it to be spit out. No luck.

The eject button on the keyboard eventually caused the windows OS DVD to be ejected.

So then I figured lets see what happens when there is a mac install disk already inside the drive when I hook it up to the mini.

So I reconnected the UJ167 to the PC, put in a snow leopard installation DVD, disconnected it and connected it to the mini.


Mini tried to boot from DVD but stops with a CPU unsupported error.....


Soooo, it seems that so far the only thing which does not work is the insertion of the HD and that it is a firmware issue.

I can't escape the feeling apple did this on purpose...
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geeji
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PostPosted: Wed Mar 20, 2013 11:35 pm    Post subject: Reply with quote

@Not Sure : I am really sorry that after investing so much energy in that project, you still have a problem, which seems identical to the one blocking justbecause.
I have verified that it is not a Mountain Lion 10.8.2 issue on my Mac Mini 2011 (see one of my previous post), so it is either a Mac Mini 2012 firmware issue as you surmise, or a 10.8.2 issue since the Mac Mini 2012 seems to have been originally delivered with a special purpose advanced version of 10.8.2 (which had no need to support any internal ODD).
At that point, my only suggestion would be to install a generic version of 10.8.3 on an external FW/USB disk, boot from it with the ODD internally connected and see if it solves the problem.
Unfortunately, if it is a firmware issue, we are stomped unless using some hackintosk EFI solution provides a workaround.

I am really disappointed that what worked perfectly for me on the Mac Mini 2011 did not survive the next Mac Mini revision : I doubt Apple did it on purpose (for close to a year I was, AFAIK, the only one with this hack), but some overzealous tester may have found it would be a good idea to scratch the few lines of firmware for the ODD which were obviously "useless" on Mac Mini 2012...

PS : the fact that the Mac Mini 2012 refused to boot from a Snow Leopard DVD IS normal, since as a rule new hardware boots at the minimum from the OS with which it was originally shipped, which is Mountain Lion here.
Creating a DVD Install Disk from a Mountain Lion 10.8.3 full download would be an interesting test.


Last edited by geeji on Tue Apr 09, 2013 1:04 am; edited 1 time in total
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ultrix
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PostPosted: Wed Apr 03, 2013 7:51 pm    Post subject: Reply with quote

I got mine to work on a 2012 mini with a UJ267. Here are the details...

First off, I ended up breaking of the capacitor that has been mentioned when trying to reassemble the mini. Thankfully, it peeled the cap leads off the motherboard so I was easily able to solder the cap in a different spot that wouldn't interfere with the ODD.

A picture can be seen here: http://imgur.com/pUOYhwH

With respect to the optical drive, I had the same issues of the drive not wanting to swallow the disc. Not sure what could be wrong: the ODD, ODD cable, sata connector due to broken cap - I ended up getting a Slimline SATA to SATA converter. When connecting the ODD to the mini using the hard drive cable and the slimline converter, the drive swallowed the disc!

Referencing the slimline pinouts here: http://bit.ly/12h2WM8

Using a multimeter I was able to determine that when using the HDD cable with slimline adapter pin 4 (manufacturing diagnostic) was not connected to the mac mini header. When using the apple optical drive cable, the diagnostic pin was connected. After reading the spec and finding this pin is optional, I simply decided to remove it from the apple cable.

Using an xacto knife, I removed a 1/4" wide slice down the side of the slimline end of the apple odd cable, and using needle nose pliers yanked out the pin. Unfortunately, I didn't take pics, but the portion of the connector I removed is highlighted in green on this picture: http://imgur.com/LxKNNac

After removing the pin, the ODD would swallow drives. I booted the mini off both a rEFIt cd and a windows 7 cd. I am running windows 7 on it and installed off the cd. Blurays and everything seems to work just fine.
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geeji
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PostPosted: Thu Apr 04, 2013 12:42 am    Post subject: Reply with quote

Well, congratulations ultrix, you are likely the first one on the planet with a functional Mac Mini 2012 + internal Blu-ray burner !!! Very Happy Very Happy Very Happy

I understand you run only native Windows, booting directly from it, so the DVD non-swallowing issue seems definitely to be some hardware or firmware issue, not an OS X one.
I am curious how you came to suspect that the ODD might work with a slimline adapter when it would not when connected directly : educated guess or damn lucky ?

Also, why did you need to boot from a rEFIT cd, since any Mac can natively boot from a properly installed Boot Camp Windows partition ? You did not want to bother with OS X at all ?

I am also curious to understand why justbecause did not seem to have any problem with a prominent capacitor, when both you and Not Sure did (both with UJx67 ODD). May be different Mac Mini motherboards with different sizes of capacitors ? Or UJx67 Blu-ray drives slightly bigger than slim Superdrives ?
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ultrix
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PostPosted: Thu Apr 04, 2013 3:39 pm    Post subject: Reply with quote

Just to clarify, I observed the disc swallowing issue to be hardware/firmware related and not OS related. With no hard drives connected to the motherboard, only the ODD, I could not get the drive to swallow the disc until modifying the ODD cable as I described.

Now that I think about it, I did also experiment prior to modding the ODD cable with a tray loading dvd drive off of my thinkpad laptop since I wasn't sure if performing cut #6 broke my UJ267. When using the tray loading drive, I could not get the drive to eject the tray. Pressing the eject button wouldn't do anything. When I used a paper clip to eject the tray and put a disc in, the drive did spin up and read the disc. It appeared only the insert/eject functionality was broken. Knowing that disconnecting the manufacturing diagnostic pin on the ODD cable fixed this, I suspect the mini's motherboard is sending some special signals the drives don't know how to interpret.

I was playing around with rEFIt to try and get windows to install in EFI mode in order to get AHCI support enabled on the SATA controller. Come to find out, the mini's EFI is not compatible with EFI v2, so that was a dead end. Also, apple had fixed the bootcamp drivers to enable AHCI on the SATA controller since whatever blog post I had been reading at the time was written.

I chose to boot straight into windows and not use bootcamp since my primary use case is a DVR with an HD HomeRun Prime and I didn't want to lose any hard drive space to an osx partition.
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geeji
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PostPosted: Fri Apr 05, 2013 12:06 am    Post subject: Reply with quote

ultrix wrote:
Knowing that disconnecting the manufacturing diagnostic pin on the ODD cable fixed this, I suspect the mini's motherboard is sending some special signals the drives don't know how to interpret.

Well, that's seems quite simple now that you verified it, but considering the complexity of the SATA protocol and its multiple messages, I personally would not have had any hint it could be some hardware signal which just needed to be disconnected...
So congratulations again for a very educated guess Very Happy Very Happy Very Happy
We now just have to wait confirmation by justbecause and Not Sure it also worked for them on OS X too (99.99% probability).
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ultrix
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PostPosted: Fri Apr 05, 2013 2:49 pm    Post subject: Reply with quote

Hopefully it resolves the OSX issues they are seeing. I would not be surprised if installing OSX from a dvd still shows the error that the computer is incompatible with the installation media. I think the new way is to use a thumbdrive. I do expect the drive to work once OSX is installed though. I can burn a mountain lion install disc and see if it boots on my machine.

By the way, here is what the sata spec says on this pin:

http://www.serialata.org/documents/SATASlimlineConnector%20V10.pdf

MD - Signal pin used by device vendors during device testing. No host
connection is allowed, device connection is optional.
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Not Sure
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PostPosted: Thu May 16, 2013 6:24 pm    Post subject: Reply with quote

Been away, just checked this thread to see if there were any updates.

ultrix, thanks, I guess I need to take that mini apart once more Smile

Don't have much time now but I will report back once I have had a go.


I also wanted to only run windows because me and finder do NOT get along AT ALL. Wanted a mini for low energy consumption, form factor and low noise.

ultrix, do you happen to know what is different about booting using EFI?

Initially I disconnected the HD and the mini would show a folder with a "?" on the screen when you turned it on. Probably indicating it can't find an OS.

After I installed windows on a bootcamp partition, I took the internal HD with the bootcamp partition and connected it to a USB port and the mini did LESS than it did originally. NOTHING to be precise, I did not even get the folder with the "?" anymore.

I am fully aware that windows will not normally install on USB drives and won't boot because it unloads USB drivers during startup but I edited all those files and I at least expected some kind of boot with piles of errors if I had made mistakes in editing the USB related ini files and the registry. But I got NOTHING on the screen. Mini appeared like it was dead.

After putting the drive back inside it worked as normal.


Any tips?

When you say you booted from both a rEFIt CD and a windows 7 DVD, are you saying you need to use the one before you can use the other?

Or should the mini be able to boot form a windows DVD natively somehow without using bootcamp?

I had trouble installing the drivers under windows as the utility refused to install so I had to install the drivers manually.

When I was done USB3 did not work. All I got was USB2 speed.

So far not much fun.....
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geeji
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PostPosted: Thu May 16, 2013 11:53 pm    Post subject: Reply with quote

The way Apple implemented Boot Camp is a pain : you can only have ONE Boot Camp partition, and it MUST be on the INTERNAL disk.
That explains your difficulties.
Many people have tried like you to circumvent those limitations, but AFAIK none have been successful, at least in a straightforward manner.

On the other hand, if what you dislike most in OS X is just the Finder, you could as well boot with OS X, then immediately start Parallels and switch to Windows full screen.
Parallels does not have the same restrictions as Boot Camp regarding the "latest" Windows version installed (but you have to buy it separately).
I will be interested to know if ultrix has a more direct solution for Windows boot...
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trial&error
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PostPosted: Wed Jul 31, 2013 10:52 am    Post subject: Reply with quote

Hi,

I tried Ultrix method of taking out pin 4 of the slimline SATA.

Strangely it didn't work. On close observation, the manufacturing diagnostic seems to be located at the power side of the slimline connector not the data side (power side has 6 pins as oppose to data side's 7 pins). It is also the same one being referred to in http://bit.ly/12h2WM8.

Could I have taken out the wrong pin? Ultrix since you didn't take the picture, can you please confirm that it is the power side pin 4 that need to be taken out?

Thanks
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trial&error
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PostPosted: Fri Aug 02, 2013 9:05 am    Post subject: Reply with quote

Hi All,

Just to say that I managed to do it by taking out pin no. 4 of the power side.

It actually didn't immediately work, but when I open up about this mac, more info, storage whilst having a disc in the slot it went on to swallow it. Seems the system need to be reminded of the existence of the optical drive.

Hope it helps to who ever out there trying to do the hack.

ps. I'm now awaiting for those Samsung 840 Evo to come out at my local store (1TB sounds good)
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geeji
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PostPosted: Fri Aug 02, 2013 9:28 am    Post subject: Reply with quote

Congratulations !
AFAIK, you are the first one to report success for that hack under OS X Very Happy .
How difficult was that surgery ? (once you decided what to pull out).
After the system recognized the drive once, does it recognizes it again automatically after a Power Off ?
Too bad you did not take any pictures...
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maitai2214
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PostPosted: Sun Nov 03, 2013 10:34 pm    Post subject: Works in Mavericks perfectly Reply with quote

Just wanted to let everyone know, I followed everything I learned from this thread and was able to successfully mod my 2012-2013 Mac mini core i7 with a superdrive. It works in mavericks perfectly. I had to remove the diagnostic pin #4 from the power side to get the disk to sallow, as well as soldering a 22 gauge wire to the capacitor, and made the cuts needed for the optical drive tray. Everything works! Upgraded to mavericks and running the drive.
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geeji
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PostPosted: Sun Nov 03, 2013 11:59 pm    Post subject: Re: Works in Mavericks perfectly Reply with quote

Congratulations !
How difficult was the pin#4 removal ? And where exactly did you do it ? (flat cable ? superdrive ?)
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MrMini
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PostPosted: Mon Nov 04, 2013 5:03 pm    Post subject: Reply with quote

WOW bookmarked, thanks!
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