Thank, that my problem sketch is working so slow , I have a file with 12 mb ,it is only raised floor and some decoration on the walls , an image materially, dont much more , i dont know if i need to fix something in sketch or in Mac . It's MacBook Pro retina 2.7 gh 16 RAM .i think is more than enough for sketch Thank to everyone and sorry for my english

hey, my name is alfonso i am new in this forum , where can I ask about sketch for mac , I m new with my mac and sketch is not working good there. thank a lot