My 2011 iMac 27 will Airdrop to/from my MBP Late 2008, but cannot do it to/from the iPhone 6 Plus....on either iMac or MBP. Does anyone know why that is? I Googled it, but many people are having the same problems with no answer. I have read that Late 2008 MBP should work with Airdrop, and also read that it has to be 2012 or later. Thanks in advance.