Sorry about your projection and god mic issues, but at least you kept it together. Plus, it makes an amusing story!macbeth macbeth macbeth...
As for Macbeth, I don't say it in a theater, however, in my Shakespeare & Composition class, or elsewhere, I'm fine with it.
We had a similar (but less interesting), and oddly, Macbeth-oriented thing happen in an off-the-wall rendition Romeo and Juliet last year. The actor playing Lord Montague said "Macbeth" repeatedly to show off his bravery backstage. Just after, the lights and projection were supposed to go for the next scene. For the show, instead of receiving a letter Romeo was on a laptop. The other actor who was projected in theory, had filmed this scene however many weeks ago, and didn't have any of his lines memorized. Of course, the projection didn't go (I forget why, I wasn't on that show.) so he had to be thrown onstage in projection's place. He ad-libbed and the scene finished, skipping an audio cue and multiple lx. A few other things happened just after, involving a loss of power for the FOH electric (this was before we had our theater rewired, and was a common occurrence then). By the end of the show, the SM was not doing so well...
So I'm glad you lived through it, and kept the show going!