EndNote X9 cite while you write

I have a Macbook Air and am running Endnote X9. When I try to insert a reference from my list, it takes an age to firstly bring up the search box and then to insert the reference and bibliography. Google searches are saying it’s just the way it is- is there anything I can do?

Almost makes it worthless, it has taken me 4 hours + to insert 30 references