McGhee took charge last summer after Motherwell avoided relegation on the penultimate day of the season despite losing at home to St Mirren.
McGhee insists he has performed no magic trick - just encouraged the players to show their quality.
"The fact is it is not a miracle as these boys are good enough," McGhee said.
"They have proven over the season to be good enough and all I have done is brought that out and encouraged it.
"(Assistant manager) Scott Leitch has been a superb lieutenant this year for me. We have worked as a team all of us and we all deserve equal credit."