Colours on my Toronto headshot photography website show up funny. All other sites OK

It's only showing up weird on my mac on this one site, don't know if it's a display issue? I'm on 15.3.2 and all other devices show the proper colours, so don't know if it's an issue with the website or my monitor.

I don't think it's the website because my other websites (also hosted on squarespace) show up just fine.

Websites (for comparison):

Toronto headshot photography (colours not showing up properly saturated)

Toronto photos studio rental (colours show up just fine)

See screenshot and let me know if it's heavily desaturated for you too?

Obviously if my prospective clients are seeing heavily desaturated images on the website it's not great because my whole photographic portrait style is based on saturated, rich colours with a rich dynamic range.

So hoping someone could shed some light on this or at least reassure me that it's only happening on MY MAC? Anyone dealt with this issue in the past before?

Thanks in advance friends!

[Edited by Moderator]