1: Userbenchmark.com is terrible and nobody should use it for anything. At least their CPU side of things is hopelessly bought & paid for by Intel (and even within the Intel lineup they give terrible & wrong advice), maybe the GPU side is better but I wouldn't count on it.
2: The real question there isn't "why is the 1050 Ti not faster?" it's "how did you run a 1050 Ti on MacOS in the first place, since Nvidia doesn't make MacOS drivers anymore and hasn't for a long time?"