Q: how to fix bootcamp error: No bootable device --- insert boot disk and press any key

What is the year/model of your Mac?

Your Mac model officially does not support W10 as noted in Use Windows 10 on your Mac with Boot Camp - Apple Support . Your Mac needs to use a physical DVD and the built-in Optical drive to install Windows. USB Installation of Windows is not supported on your specific model.

If you still want W10 on this Mac, install W7/W8.1 first, and then run an in-place upgrade to W10. This will allow your drivers to work properly and the Apple hardware will continue to work.

Run SMC and NVRAM Reset and retry. Did you have any external storage connected during your installation process? Does the DVD mount on the OS X side properly?

khushbaj wrote:

 

ACtully same thing happen with dvd also

Are you modifying Bootcamp Info.plist in anyway? Do not connect any external storage to your Mac when using the DVD?

Reset the System Management Controller (SMC) on your Mac - Apple Support

How to Reset NVRAM on your Mac - Apple Support

A modified plist will cause more problems then solve. Use the DVD method after the two resets. Do you have more than one disk in your Mac?