I am using Windows 7 and want to know how I can make USB bootable for installing MAC OS on my laptop.
I hate to be a dick but I swear the people who answered this question can't read. hes not trying to install OS X on a windows computer hes trying to make a bootable USB so he can install a fresh copy of OS X on a mac.
It is impossible to do that directly from Windows. You must run Mac OS X. It is not legal to run Mac OS X on any other computer than Macintosh. But, you can install Mac OS X on Hacintosh or on virtual machine (VMware, VirtualBox). Then you can make bootable USB. And the easiest way is to use program Lion DiskMaker, http://liondiskmaker.com/.
But once again, you must have fully working version of Mac OS X and of course Mountain Lion DMG file bought in AppStore.
You can check also instructions on this page: http://www.sysprobs.com/category/vmware
But the best solution is: If you want Mac OS X buy Mac.
I think the first question you should ask is: will it even work? It takes a lot of tweaking and you will have to do research on your hardware for the DSDT file you'll need. I would advise against trying to hackintosh your laptop and if you really want to experience OS X for a cheaper price, building a custom desktop would be the best option. Check out http://wiki.osx86project.org/wiki/index.php/Main_Page if you do embark on that route.
DalSan M gave the correct suggestion. However, if you do not have a legal OS X copy, then probably you need to go the Hackintosh way. Checkout the iATKos project. However, we here do not support software piracy, so you can check it out at your own responsibility.
This might be of help: //www.makeuseof.com/answers/create-bootable-mac-usb-windows-xp/ It doesn't matter the version of Windows, it matters if you already have a working installation of Mac OSX before creating a bootable USB. DVD installation is easier and has less requirements before installation than USB.
I can't understand there propely. If you tell me here step by step i will be very thankful to you.
If you do not have a legal copy of OSX, then the iATKos project method that Rajaa mentioned should be used. Follow the steps Anonymous stated, which was taken from here: http://computersight.com/operating-systems/iatkos_v7/#ixzz1FeySQbTu after downloading all necessary files and following the guide here: http://www.macbreaker.com/2013/01/install-mountain-lion-iatkos-ml2-hackintosh.html, you should be able to install Hackintosh from USB. Make sure that your laptop is compatible with the hackintosh before starting.