Image slider issues in Safari and Chrome on a mac

Hello,

I recently updated all the theme files on this website, but ever since doing that the home page image scroller is not working on macs. It does not get stretched full width in Safari and Chrome. This is a problem as it was working perfectly fine before then. I cannot see how to fix this at all. I recreated the image slider. I created it new to the largest web browser size there is but it sill has not fixed the issue.

Please can you help as its very frustrating. It doesnt happen on any browsers on a pc.

Please can you take a look to see why this would be happening with the latest updates. Everyone on the site is up to date.

The page I need help with: [log in to see the link]