remove windows from my mac

Use Boot Camp Assistant again and select the option to return the hd to a single OSx partition.

how to get back to osx when i already installed the windows so i can use the boot camp to erease windows? in other words, i cannot go back to osx 😟

Press and hol down the option key when you power up your computer. Then when the boot menu appears select OSx.

ok ok, what is the option key please? where do you i find it?

alt/option lower right of the keyboard on my Macbook Pro.

The Option key is the Alt key. Another way to start into OS X is holding the X key while your computer is starting

got it, thx