File-format incompatibility between Apple Mac OS and Microsoft Windows operating-systems is something every user faces utilizing both operating-systems. One such incompatibility is the disk-image format used by both operating-systems, while Apple Mac OS uses .CDR format Microsoft Windows utilizes the international disk-imaging standard .ISO, so you would need something to convert .CDR to .ISO file-format and vice-versa to use them under rival operating-systems. Luckily, the only difference between two is the file-extension, and all one needs to do is to change the .ISO/.CDR extension to make them work interchangeably without any real file-format conversion. We can also use this fact to make perfectly bootable USB disks from .CDR files from Windows and Linux using existing tools allowing cloning of .ISO format to USB.

If you are an fairly advanced computer user, at times you may need to boot from devices other then the default hard-disk, mainly to troubleshoot virus infections and other critical operating-system related issues, I had shared tips on how to make bootable cd for performing advance system tasks on windows. Today I will share few utilities enabling you to create bootable USB pen drives with ease, you need to have Motherboard/BIOS with USB boot support for this to work.

MakeBootable is an free and simple-to-use utility to make your Pen Drive act as a boot-up disk without erasing any data on the device. It consists of a single executable file and requires no installation, However the utility will only work on USB device's using Phison’s chip solution and FAT file-system only (you can re-format your drives to FAT easily).