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[SUCCESS] Dell Optiplex 745-Mountain Lion

Joined
Nov 10, 2011
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177
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Gigabyte Z77X-UP5 TH
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i7-3770
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Radeon R9 270
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The 755 is pretty close, but tends to have fewer issues then the 745. Unfortunately I'm not going to be able to try it until I go home for Thanksgiving. I'll post it then. I suggest swapping out the hard drive so if it doesn't work, you won't have to install mountain lion all over again. Let me know how it goes.
 
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My 745 keeps resetting the BIOS to defaults.
The installer cannot see the HD.
How did you fix that?
 
Joined
Nov 16, 2012
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Dell Optiplex 745
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intel Q6600
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Nvidia 8400GS
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My 745 keeps resetting the BIOS to defaults.
The installer cannot see the HD.
How did you fix that?

EvOreboot fixes the BIOS reset.

Also you will need the IOATAFamily.kext (put in your extra folder on the installer) to allow the installer to see your internal drive :)

Dan
 
Joined
Nov 17, 2013
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i fix it by using EvOreboot

but i always get error with installation




always get error with osinstall.pkg essentials.pkg
 
Joined
Nov 10, 2011
Messages
177
Motherboard
Gigabyte Z77X-UP5 TH
CPU
i7-3770
Graphics
Radeon R9 270
Mac
MacBook Pro
Mobile Phone
Android
If you look at the instructions, the first step is creating the unibeast installer. The ONLY changes you make to it is to put the patched ioatafamily.kext i made into Extra/Extensions folder on it. This is what allows the installer to see your hd. Do not install Evoreboot or anything else to the unibeast installer flash drive. Just run the installer from it and reboot.
The bios will reset after the installer finishes so put them back to the recommended settings on the guide after the reboot.
Then reboot from the unibeast flash drive and select the new installation. Now you'll boot into your new installation and you can follow the post installation section which includes installing evoreboot to stop the bios reset
 
Joined
Nov 10, 2011
Messages
177
Motherboard
Gigabyte Z77X-UP5 TH
CPU
i7-3770
Graphics
Radeon R9 270
Mac
MacBook Pro
Mobile Phone
Android
Note that ElliottForceLegacyRTC also prevents the bios reset but is unstable and has caused inconsistent kernel panics for me and so I don't recommend it
 
Joined
Nov 17, 2013
Messages
7
Motherboard
10.7
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dell
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intel
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in my case the bios rest before the installation start not after the installation but i fix it buy the kext no my problem is the osinstall.pkg and essentials.pkg i got error with them :(
 
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