I have an old late 2008 MacBookPro that I erased the disc. I had replaced the HDD with a Crucial SSD some years back, and just wiped it clean. Can't seem to reload OS X, the latest the hardware supports is El Capitan. Is that even still available? It's connected to the internet, and I can get to the download window for El Capitan, but it won't d/l. Is my hardware too old? Thanks