Hello Jessica,
thank you very much for your response! With your recipe, I could eventually make it work at least on one of my two machines. On the other one, a Macbook with OS 10.14.5 installed, Python will crash after importing Nest in Spyder. When executing another python file, Spyder reloads hundreds of modules before generating the output. Could it be, that I somehow corrupted my Python build in the process of installing Nest? Could I try a workaround to prevent this?
Thank you for your time, best regards, Michael