It looks like the build on TravisCI is failing. I only had a cursory look at the output and couldn't immediately see what's wrong, but this needs fixing.

I'm also not sure about mixing a number of different concerns in this single PR, but I will comment on them individually.

Looks like the Travis build failed for this particular run due to an issue in Apple's simulator control. My build of the same commit succeeded: https://travis-ci.com/madsolar8582/ocmock/builds/90191297

Good news, I re-ran the build manually and it passed now.

Thanks Erik. I merged your current changes onto this branch.

To be honest, I'd feel better to wait until Xcode 11 has left beta and is generally available.

For future PRs: it was slightly confusing to see a PR with the title "Update to Xcode 11" and a date of November 2018. For a moment I thought I had missed something. Would be good open a new PR instead of repurposing an old one.

Thank you for submitting these PR's. It seems you're always a step ahead of what's available through normal channels. I will now update to Xcode 11.1, which is, according to the AppStore, the current version.