There is a thing called a "virtual machine" which can be run like an application on your computer.
This is a bit like running a minature of your operating system inside a window on your computer.

If you are confident enough to install and use one of these they are a great way of protecting yourself.
You install the VM software.
You create a software version of the operating system that runs on it's own inside your computers memory.
You login into the VM which is running on your computer and then from within this application/environment you can browse to the site and see what occurs.
If it is evil you logout of the VM and delete it.
I have yet to find a nasty that can escape out of this VM model and onto the main computer but one day.....

If you worry about a download then always stop and do a search on
1. Its URL and address
2. The web page it is hosted on
3. Any other unique item you can see on the screen that might be reported if you were to think about it.
These searches can flush out the bad stuff before you hit accept.

The point re going to the vendors site. Very good recommendation. Google rankings can be hijacked resulting in bad stuff being on the first page in some cases.
There is a lot available on the Apple support pages if you go to them as well.

If you get stuck you are always eelcome to get in touch.

Everyone loves a Morgan. Even me, unless it's broken again.