UEFI Firmware SettingsPress Del or F2 on your keyboard to access firmware settings and go to "Advanced Mode".

If you have a NVIDIA or ATI GPU with UEFI VBIOS, make sure that CMS is disabled.  Else, set it to enabled.

Disable Secure Boot by changing OS Type to "Other OS".

Disable iGP.

Chameleon 2 RC4 for Intel GMA (version 2)24 febbraio 2010

This is a new version of the modified Chameleon 2 RC4 bootloader, to get (wide) native resolution on most Intel GMA. I tried to solve the common problems of the previous release.

The behaviour of the bootloader has been modified  as follows:1. The desired resolution is read from “Graphics Mode” key in com.apple.Boot.plist2. If the key is not present, the bootloader reads the default resolution of your LCD/Monitor from EDID3. The first entry of vesa bios modetable is patched with the new resolution, so OSX can find it and boot correctly.

-The major improvement is that now you can specify your custom wide resolution. For example, on my Inspiron 1545, I was able to get 1280×720 instead of 1366×768. Obviously, the resolution must be supported by your monitor and graphics card, so first ensure of that using windows or linux.The string format must be in the classical form:<key>Graphics Mode</key>< string>1280x720x32</string>Don’t forget to check for the existance of com.apple.Boot.plist both in /Extra and /Library/Preferences/SystemConfiguration directories.

-In addition, you can overwhelm many other cases in which the default resolution reported by edid is not the maximum supported by the monitor, but a mere 1024×768.

In this version I also added new deviceId strings, to recognize the last variants of GMA 4500, such as Optiplex.

- If you want to report any problems, please include in the comment your notebook/motherboard model, the output of:lspci -nn|grep -i 'memory\|dram' (lspci is here)

and better, a video bios dump. From linux:sudo dd if=/dev/mem of=vbios.dmp bs=65536 skip=12 count=1 and send me vbios.dmp.

In the package I’ve included all the compiled binaries, and the sources in the form of a diff patch.-Install as you do with the original bootloader. If you already installed Chameleon RC4, just open the terminal and copy the boot file in your root directory, e.g.:$ cd Desktop/ChameleonMR2$ sudo cp boot /(And give your password)

Mavericks to USB

Open terminal and type:sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/CloverBoot --applicationpath /Applications/Install\ OS\ X\ Mavericks.app --no interaction

It should show:Erasing Disk: 0%... 10%... 20%... 100%...Copying installer files to disk... Copy complete. 

Making disk bootable... Copying boot files...Copy complete. Done.