hello! I am attempting to connect 2 MacBook pros via a thunderbolt cable, in order to run a data recovery on one of the MacBooks. Ie: a host computer (mine) the target mode computer (my sister’s MacBook) with the intention to load hers onto mine as an external HD to scan using third party software for her erased hardrive- most consequently “photos library”. What I have done so far: plugged both machines together with the thunderbolt cable, AC power on for both, boot up target disk (sister’s) holding T down. Result: her screen has 2 icons on it: thunderbolt and target disk mode and HD does NOT show in my my MacBook. For a brief period it did come up on my desktop but then disappeared. I noted that during that period, only the thunderbolt icon was present on my sister’s MacBook. Any help would be appreciated! Apologies for the convoluted explanation of my issue.