If you are looking for offline installer of Safari browser for windows and Mac, then you are in the right way.
IE5 was the last ever version for Mac and no new Mac in the past 7 years ships IE. Why are you testing for Internet Explorer on the Mac? I can only think that your client is using it, very few else will be that matter anymore. There are two ways to run a more current version. The last native version of Internet Explorer for Mac was IE5, in about 2003. How to install Internet Explorer on Mac OS X 10.11.6 ( EL Captain OS )? Stack Exchange Network.