EGPU Build for thunderbolt 1
I have built setups for both my late2016 mbptb as well as a 2012 mbp unibody. With thunderbolt 1 I got the thunderbolt 3 to thunderbolt apple adapter and built as follows
Akitio Node Pro with upgraded PSU and fans
GTX760 because that is the only card I had laying around besides the vega56 I have in my Core X.I partitioned the internal drive to allow for the copying automateegpuefi to its own partition and then installed refind to make it clean if you have a bootcamp or dualboot setup.Bootcamp setup is more model specific in my testing but many valuable guides and builds can be found on the site.For future proofing I would suggest to go with a TB3 enclosure. They work just fine with the adapter and TB1.
I use an Akitio Node with an nVidia 1070 in both Windows and OS X on my 2012 15” Retina MBP. It works great, and Mac OS setup is super easy (Windows a bit harder). Build guide is in my signature. I’m about to replace it with a AMD Vega 56 so I can upgrade to 10.14 though.