So I've just bought the latest MacBook Pro (late 2019, 16") and bumped into the common issue of not finding 1 piece of Ethernet adapter. I want to use only Apple made adapters, so I'm left with the option of buying Apple Thunderbolt 2 to Ethernet adapter AND the Apple Thunderbolt 2 to Thunderbolt 3 adapter and daisy chain them. So, since I've been using MacBook Air (mid 2012, 13"), I already own an Ethernet to Thunderbolt adapter (Apple made). The only thing that I'm still not certain about is - does the adapter I already have use Thunderbolt 1 or Thunderbolt 2? According to Apple's spec, MacBook Air (mid 2012, 13") has Thunderbolt 1, but I have a feeling it's actually Thunderbolt 2, because when I look at system's preference, I see that the thunderbolt connection throughput is 10GB/s * 2 (written exactly like that - * 2!) So.. 10*2 is 20, and 20GB/s is equivalent to Thunderbolt 2, right? I also tried to read the specs of the Ethernet to TB adapter I have, but it doesn't mention which TB it is!
Bottom line: can I simply purchase the TB2 to TB3 adapter and chain it to the current Ethernet to TBx (x=1/2, I don't know!) I already have? Thanks!