RadGrid skins look the same, no matter which operating system you are using. You can check that at our online demos:
(change the skin from the dropdown at the top-right corner of the white demo area)
If it is only the buttons
which differ, you can style them with RadFormDecorator:
Let us know if you need further assistance. Sending screenshots may help us understand more easily what exactly the problem is.
the Telerik team