Like I said, apologies! Obviously, I didn't make myself clear at all! Bodycalming, I can confirm that it isn't always possible to successfully sign into ebay. Especially if you need to clear your cookies.
Thank you Carolyn, I actually laughed when I read your reply and I'm sorry to have wasted your time. I've been on ebay since 2003 so I know how to sign in there, I was just being bounced back to the sign in page each time I tried. As I said, I knew how to deal with it on my old pc but was at a loss on my shiny new Mac.
shdr2thewheel, thank you for those links, I've had a quick look and they seem really useful. I've already implemented a few changes! I found the drop down menu now and have cleared my cookies and it seems to be working just fine.
Thank you!