Might be better posting a link to site, so it can be viewed in real time?

Guennadi, when providing the link can you also indicate the age of the macbook and which browser? Is you Macbook fully updated and have you tried an alternative browser?

I use a Mac frequently and have no issues viewing my sites using both Firefox and Safari (running OSX Mojave). However, as Esahc points out, it all depends on the actual laptop and what software it runs. If it is a Macbook (as opposed to a Macbook Pro) then there are two types it could be and one of them may have issues running a modern browser.

The "Retina" Macbook (made from 2015 to 2019) should have no issues. If it is the older white (polycarbonate) model then there may be problems with what browser you can run on it, depending on the version of OSX it is running. Not a lot of people are still using these regularly, so it may not really be an issue for your site. Let us know the details and hopefully we can sort the issue for you.