I have a macbook pro about 5 yrs old, works great but I need to be able to use it out in my metal sided shop 40 yds from the cisco linksys E2000. Is there some antenna devise I could mount on the outside of shop pointing to the router, then hook up my Mac to it inside the shop? Also I have the original OS X should I upgrade, are the benefits worth it ? I am here to learn so thanks for your input.