how Can i Download free wechat in my Macbook

Locate file source. Download.

I don't know. Search for it on Google. These are Apple forums, not file location services.

If the maker of that software did not wish to comply with whatever necessary

agreement or conditions to have their product hosted on the App Store online

then their home web page is the best place to try & find their product.

Be wary of software download sites that also offer cleanmymac, softonic, and

a host of other ads, because you may incidentally get these other unnecessary

items such as mackeeper, etc in your computer, because some of these third

party sites use the visitor as an opportunity to sell or load their software up to

your computer (sometimes in the background) and so visit the maker's site to

get the specific software title. Be wary and leery of unproven sources online.

Hopefully you can find the product, whatever it is

(it is not by Apple) & it works out for you...

Good luck & happy computing! 🙂