Blue Iris is not available for Mac but there are some alternatives that runs on macOS with similar functionality. The best Mac alternative is Shinobi. It's not free, so if you're looking for a free alternative, you could try Shinobi or AtHome Video Streamer. If that doesn't suit you, our users have ranked more than 25 alternatives to Blue Iris and ten of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Blue Iris are Ambianic.ai, Kerberos.IO, Agent DVR and xeoma.
Sighthound is extremely basic really. It doesn't support PTZ, it only supports AAC for audio on Mac (does support a few others on Windows), it doesn't support mechanical zooms...basically, anything your camera does more than video recording, Sighthound does not support.
I think it is a pretty good bit of software and one day may be amazing, but it is currently nothing better than an alpha product still developing many features that most other NVR Software packages already support.