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Lol, got it booting. Heres what I did:

1) Took a second macbook pro (non early 2011, an older model), booted it from a lion dp4 DVD i made.
2) Hooked up my macbookpro8,2 (early 2011) and booted it in target disk mode, installed DP4 from the older macbook pro onto the new macbook pro via the firewire cable.
3) Followed the IO802 kext removal instructions from here: https://forums.macrumors.com/threads/1145144/

Notebook now boots (without wifi support).

Now I'll run the kext replacement instructions from https://forums.macrumors.com/threads/1145144/ to get my wifi back.

Yeay! :D

That's great.. But honestly this is not an acceptable solution. Apple should roll out a fix ASAP. I'm obviously having the same problem, on a 2011 MacBook Pro. ********** paid 99$ only for DP4 only to discover i couldn't install. C***sucking Apple newbs
 
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Same here DP4 on iMac 2.8 GHz Intel Core 2 Duo processor ... first try hanging and later on message saying install error try restart and install again... same story. This time did not even start installing but hanged at "preparing to install" screen.

All Ok on MacBook pro 17''

What's happening?

I don't know what and how it has happened, but yesterday night I tried again after 3 or 4 other trials... it went through as it was the most natural thing in this world... same machine, same installer, same condition... it just installed and booted without a glitch!
I sincerely don't know what the heck is happening!
 
I don't know what and how it has happened, but yesterday night I tried again after 3 or 4 other trials... it went through as it was the most natural thing in this world... same machine, same installer, same condition... it just installed and booted without a glitch!
I sincerely don't know what the heck is happening!

On what machine ?
 
Hi all,

Having had the same problems (hang at reboot) on my brand new (1 month old) MacBook Pro 13" i7, I just wanted to let you know that I finally managed to get it up and running.

- I booted into Single-user mode
- mounted the drive in rw
- did a file system check
- and last, but not least, renamed/deleted the IO80211Family.kext directory (in single user mode, it's seen as a directory, not as a file)

After that, the MacBook booted just fine and I'm up and running DP4 but without WLAN for now. I'll try to reinstall the DP2 next or even the SL one to see if that works.
 
Hi all,

Having had the same problems (hang at reboot) on my brand new (1 month old) MacBook Pro 13" i7, I just wanted to let you know that I finally managed to get it up and running.

- I booted into Single-user mode
- mounted the drive in rw
- did a file system check
- and last, but not least, renamed/deleted the IO80211Family.kext directory (in single user mode, it's seen as a directory, not as a file)

After that, the MacBook booted just fine and I'm up and running DP4 but without WLAN for now. I'll try to reinstall the DP2 next or even the SL one to see if that works.

your steps?did you install in primary partition or second or what?or upgrade from dp3?
 
Hi,
sorry I could have been more precise.

I did an upgrade of my running SL install on my primary disk / partition.
After the DP3 problems (I never got DP3 working ok on my Mac, having glitches with WLAN but also with the Graphics) and the announcement of the official launch next month, I figured that DP4 would be close enough to GM with the obvious DP3 pbs corrected and thus install over my SL would be just fine on my brand new machine. Ok, I was wrong on that one (did do a TimeMachine however prior to launching Lion install;) ).

So I launched the setup from within SL. After like 10 mins of copying the necessary files, the MacBook rebooted and hang straight away. I powered it off and then back on for like 2 or 3 times and finally got to the install screen. When I came back like 1h later I was once again blocked on the boot screen with the non-spinning wheel. So I don't precisely know when the bloody thing hang. From that point on, no way to boot. Normal boot would hang in the boot screen, boot into recovery HD would give me the same boot screen hang but the boot screen being in a flashy green color. Verbose boot would show me a hang right after a "Created virtif ..." line.

This is when I booted into single user mode to do a file system check and deletion of the IO80211Family.kext file/directory.

Hope this helps.

Bye
 
Hi,
sorry I could have been more precise.

I did an upgrade of my running SL install on my primary disk / partition.
After the DP3 problems (I never got DP3 working ok on my Mac, having glitches with WLAN but also with the Graphics) and the announcement of the official launch next month, I figured that DP4 would be close enough to GM with the obvious DP3 pbs corrected and thus install over my SL would be just fine on my brand new machine. Ok, I was wrong on that one (did do a TimeMachine however prior to launching Lion install;) ).

So I launched the setup from within SL. After like 10 mins of copying the necessary files, the MacBook rebooted and hang straight away. I powered it off and then back on for like 2 or 3 times and finally got to the install screen. When I came back like 1h later I was once again blocked on the boot screen with the non-spinning wheel. So I don't precisely know when the bloody thing hang. From that point on, no way to boot. Normal boot would hang in the boot screen, boot into recovery HD would give me the same boot screen hang but the boot screen being in a flashy green color. Verbose boot would show me a hang right after a "Created virtif ..." line.

This is when I booted into single user mode to do a file system check and deletion of the IO80211Family.kext file/directory.

Hope this helps.

Bye

tnx, i'm in single user now.. but disk1s3 is write locked..how to mount this?tnxx
 
I had a problem installing it aswell, but I found a way to get it to install, I have a 2011 15" MBP btw..

When my MPB was booting I held the option key, then when your HD comes up hold CMD + S and press enter, now you're booting in safe mode, and the installation went fine..

But now I've got another problem, Lion is installed but it won't boot... It just stays at the grey screen with the logo in the middle and a spinning thing underneath it, but the spinning thing has stopped spinning, and doesn't do a thing... It just hangs there... Anyone got an idea?
 
@omnikohh : Strange. What disk/partition you are booting into? The mount instruction I gave you is supposed to mount/promote the current disk/partition (node "/") into read/write mode. If you boot into another partition, you'll need to adjust the mount instruction accordingly or boot into SL if installed on one of the other partitions and then do it from within Finder.

@kristoffers4 : This is just the point I'm discussing right now. The boot hang seems to be due to the WLAN driver which is buggy in DP4 and already was in DP3. So first, you need to get rid of their driver by deleting / moving ore renaming it.

Either do so using single user mode or, if you have another working bootable partition with, let's say, Snow Leopard, you can do it from within that SL installation.
 
@omnikohh : Strange. What disk/partition you are booting into? The mount instruction I gave you is supposed to mount/promote the current disk/partition (node "/") into read/write mode. If you boot into another partition, you'll need to adjust the mount instruction accordingly or boot into SL if installed on one of the other partitions and then do it from within Finder.

@kristoffers4 : This is just the point I'm discussing right now. The boot hang seems to be due to the WLAN driver which is buggy in DP4 and already was in DP3. So first, you need to get rid of their driver by deleting / moving ore renaming it.

Either do so using single user mode or, if you have another working bootable partition with, let's say, Snow Leopard, you can do it from within that SL installation.

Ok, now i'm installing for the third time SL on second partition, then try to launch dp4 installation from SL to Lion (clean) partition, then mbp restart and after i must enter in single user to delete IO80211? is it right? tnxx
 
I had same error as OP and I just restarted and tried again and it was fine. This was an upgrade from DP3 to DP4.
 
Finally, I've got DP4 working on my macbook pro 2011.
From SL installing to clear partition.
1. When first reboot - nothing happens. I've connected booted into target mode macbook pro to white iMac and install booted correctly. But, when install are verifying computer data with apple website (oh yeah), there is an error: can't install to this mac. Ok.
2. Rebooting macbook pro from target mode and (sic!) and install GOES FINE! I have no idea why this is happening. Seems to me, that there are partition check in place, as mention earlier, but I cannot remount in rw mode root installer partition - always kernel errors whith "drive locked".
3. After install itself you need to boot into safe mode and remove /System/Library/Extensions/IO80211Family.kext (delete or move to another place). exit.
4. You have clean lion install without wifi, but there are several link to DP2 version of the driver.
 
Finally, I've got DP4 working on my macbook pro 2011.
From SL installing to clear partition.
1. When first reboot - nothing happens. I've connected booted into target mode macbook pro to white iMac and install booted correctly. But, when install are verifying computer data with apple website (oh yeah), there is an error: can't install to this mac. Ok.
2. Rebooting macbook pro from target mode and (sic!) and install GOES FINE! I have no idea why this is happening. Seems to me, that there are partition check in place, as mention earlier, but I cannot remount in rw mode root installer partition - always kernel errors whith "drive locked".
3. After install itself you need to boot into safe mode and remove /System/Library/Extensions/IO80211Family.kext (delete or move to another place). exit.
4. You have clean lion install without wifi, but there are several link to DP2 version of the driver.

don't have a firewire cable :(
 
@kristoffers4 : This is just the point I'm discussing right now. The boot hang seems to be due to the WLAN driver which is buggy in DP4 and already was in DP3. So first, you need to get rid of their driver by deleting / moving ore renaming it.


Ok, I'm trying to delete the file in bootcamp using Windows, but that failed. Could you explain how to delete the file in Single-user mode? So I hold cmd+S during boot and then? Delete it in the command line?
 
The same Problem here in Germany on my MBP 2011 early... Disk Utility, Verify and Repair didn´t worked. After Reboot the Installer Freezes... so any help! Why a Developer comes out that don´t work especially on the NEW MBP 2011 ??? Any News any Tips any Helps???

Maybe someone have a modified lion.app with the right wifi.kext so install will work?
 
Ok, I'm trying to delete the file in bootcamp using Windows, but that failed. Could you explain how to delete the file in Single-user mode? So I hold cmd+S during boot and then? Delete it in the command line?

In Single-User Mode
a) to mount the partition in read-write mode (it's read-only):
Code:
/sbin/mount -uw /

b) to list all entries starting of with IO80 (just for control) :
Code:
ls /System/Library/Extensions/IO80*
(IO80211Family.kext should be listed if you're in the right directory)

c) to delete the extension
Code:
rm -rfv /System/Library/Extensions/IO80211Family.kext

or to just rename the extension :
Code:
mv /System/Library/Extensions/IO80211Family.kext /System/Library/Extensions/IO80211Family.kext.bad

d) list again the IO80 extensions to check deletion or renaming did work :
Code:
ls IO80*

e) optionally you could adjust / check the ownership and privileges (but that can also be done in Lion from the disk utility) :

Code:
chmod -R 755 /System/Library/Extensions/
chown -R root:wheel /System/Library/Extensions/
touch /System/Library/Extensions/
exit


That you should be it. Reboot and you should be good.

EDIT : Corrected typo in the code : Was IO20811Family.kext instead of IO80211Family.kext.

Obviously the correct is IO80211Family.kext
Sorry for that.
 
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so any solutions if only macbook´s pro 2011 early are present... i mean how we can manage that the wifi kext is not loading and how we´re able to reload from the SL version?

it´s not possible to re-arange the image with the right "old" kext and make a new bootable image?
 
All this is really ridiculous. It seems like this installer is more like an alpha build. Apple must be aware of this to some extent I would think. Can you imagine if this goes on on opening day? Sheesh.... :rolleyes:
 
Sorry, had a type in my above post. Is now corrected.

In the meantime, I've tried to reinstall de IO80211Family.kext of DP4 and also the one from DP2. Neither seems to be working for me.

If I find something else I'll let you know.
 
Ok, just to let you know that I got the WLAN working with the IO80211Family.kext from my latest SL TimeMachine backup. :):):)

No idea if it going to be stable, but right now, writing this post, I'm on WLAN only.
 
This dp4 is pain. Tried installing from dp2 and it's hanging up restart on boot. I am glad that I installed Lion dp2 on another partition and my snow leopard is fine. But dp4 is unusable for now. I deleted wireless kext file from snow leopard but still same problem.

Just left it alone for now till some solution comes out. Hopefully soon. Don't like snow leopard at all after using Lion.
 
I finally got DP4 to work (without Wifi) on my MacBook Pro i7 2011.
Works kinda nice but my keyboard illuminate is always turned on (even when disabling this in the prefs). DP3 had the same issue.

BTW my beloved background (Aqua Graphite) is not available anymore. :-/

But I still cannot believe DP4 isn't installing the easy way on Apples latest MBP. The should be aware if this, not?
 
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