My Macbook Pro (2013, pre-Retina) Won't Edit a Shared Pages Document
I edit a shared Pages document which is edited by multiple users on macbook and iPad. My Macbook Pro (2013, pre-Retina) won't update past Catalina, and won't update to the latest version of Pages. It can open and read the shared document but refuses to edit. When I try to edit, it states that to collaborate on this document I must first update to a new version of Pages (the one I cannot update to on my 2013 MacBook). Other than switching to MS Word, how do I fix this ?
iPad Pro 12.9-inch Wi-Fi, Cellular