Can't run emulator

I’m trying to run ionic emulate ios (I built the project first) - blank project and it doesn’t seem to work. It looks like it’s doing something after entering the command, doesn’t print anything to screen and than back to command line. No emulator.

How can I make sure everything is installed and running fine?

Same problem here. ionic run ios also doesn’t work. After ionic build ios it also look like it’s doing something, but it doesn’t print any output.

Don’t know the reason, but after reinstalling my MAC OS (something I had to do anyhow) it’s now working for me.