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View Full Version : Unable to do a Mountain Lion Clean Install with pen drive




jfredsilva
Mar 25, 2012, 07:29 PM
Hi I have Mountain Lion installed but I want to do a clean install.
I already made a lot of clean install on Leopard, Snow Leopard and Lion with a pen drive.
My problem is after booting from a pen drive de apple logo is replaced by a forbidden logo and it's infinite.
http://img36.imageshack.us/img36/9827/26032012520.jpg (http://imageshack.us/photo/my-images/36/26032012520.jpg/)

After that I tried to do a clean install with Lion but the same thing happens.



oosk2k11
Apr 1, 2012, 03:49 PM
maybe because mountain lion isn't out yet?

Sdreed91
Apr 1, 2012, 03:55 PM
I have ML fully installed on my MBP. Have had for several weeks now. On occasion I get the same sign. What works for me is holding power button then booting up into the "recovery mode" however instead of booting into recovery I just choose the drive I'd like to boot into.

gspannu
Apr 2, 2012, 04:12 AM
I have ML fully installed on my MBP. Have had for several weeks now. On occasion I get the same sign. What works for me is holding power button then booting up into the "recovery mode" however instead of booting into recovery I just choose the drive I'd like to boot into.

Instead go booting into 'Recovery Mode' by pressing Cmd-R, try booting with just the 'Option' key. This should now show your Pen Drive as a boot-up option and you can install ML from here on.

I have installed ML DP1, DP2 numerous times like this and it works each time.
If it is still not working, it is likely that your Pen drive has not been created properly, try recreating the pen drive from the ML Install application.

Sdreed91
Apr 2, 2012, 10:47 AM
Instead go booting into 'Recovery Mode' by pressing Cmd-R, try booting with just the 'Option' key. This should now show your Pen Drive as a boot-up option and you can install ML from here on.

I have installed ML DP1, DP2 numerous times like this and it works each time.
If it is still not working, it is likely that your Pen drive has not been created properly, try recreating the pen drive from the ML Install application.

Sorry I should have specified. I did mean to boot with the option key not CMD+R

gspannu
Apr 2, 2012, 05:21 PM
I would try 2 things:

1. Zap the PRAM. Boot Mac with Cmd-Opt-P-R keys pressed until you hear the Apple chime.

2. Recreate your ML USB drive. (I think this is the main culprit).

jfredsilva
Apr 2, 2012, 06:13 PM
I was able to do a clean install using LionDiskMaker.

Red1Studios
Apr 10, 2012, 03:31 PM
Can anyone figure out how to make a bootable DVD for Mountain Lion DP4 ?

Sdreed91
Apr 10, 2012, 06:17 PM
Can anyone figure out how to make a bootable DVD for Mountain Lion DP4 ?

Umm there hasn't even been a DP3 yet