One way to look for MOND effects is to look closely at the outer Solar system, where distances are larger than can be examined on Earth, but things are close enough for small effects to be measurable from Earth. And in a new paper published on Arxiv, people have done just that. The known "Extreme Trans-Neptunian Objects" ("ETNO"s — closest separation from Sol outside Neptune's orbit ; furthest separation 150 ~ 1500 AU) are closely clustered in direction — the evidence that Batygin, Brown, Sheppard and Trujillo have used in the last five years as evidence for a ninth planet in the Solar system. (No, Pluto is not a planet. Unless you want it to be about 10th or 11th in a 100+ planetary system.) It was possible that the MOND hypothesis might explain the orientation of the ETNOs, so the idea has been examined in detail (paper) — and found it less than 1% likely to explain the observations.
MOND remains an attractive type of hypothesis to explain the observational evidence of the universe's structure without postulating major changes in our understanding of physics. But again, it has failed at the test of new data types. Which still leaves physics with no viable alternative to the Matter / Dark Matter/ Dark Energy hypothesis.