Connecting with Microbit

Hello I am currently having trouble connecting the app with a microbit. I saw another post discussing the topic but when I tried it didn't work. Could it be that I am working on my Mac?

I don't know how you are trying to connect. I always use MicroBlocks and the MicroBlocks extension. The blocks of this extension are also present in the iOS companion. I don't have a MAC myself so can not help with that.