Hi, I'm Matt Sergei (do call me Matt, please) and I can help you (use MacBook Pro for all my development for 10 years, 26 years a webmaster).
Do send me the URL I can access first to quickly analyze and confirm it's possible to add fixes for proper website opening and browsing in Safari.
I usually offload at least critical parts of website to test, establish proper behavior and then implement changes for employer. So remote fixing is possible after first accessing your website before you accept my bid (so, message me - I never bid and accept work for projects I'm not certain it's possible/implementable).
The bid is half of my daily rate, I'm incorporated, and cannot be lower.
Regards and hope you're safe,
Matt