We don't have governors, so I'm not sure what you mean.
Aren't Canadian provincial appointments made by the Lieutenant-Governor, and federal appointments by the Governor-General? In the same way that UK appointments are made by the Queen.
(Of course, judges aren't
selected by those individuals).
Here we go, here's how the Australian government makes judicial appointments. I assume the states are each similar.
Victoria is a bit different; they advertise for their positions. Though now Carmody's gone, the Victorian judiciary are carrying the black sheep torch.
High Court appointments have a bit more politics involved than what that graphic suggests (I suppose it's subtext of "the Cabinet considers"). I think it was Mason who said that there are probably about 50 people at a time who would be qualified to be on the High Court, so the Cabinet can exercise a certain amount of choice. A few examples - French was probably helped over the line as CJ because he'd written the lead judgment in the government's favour in the
Tampa case when sitting in the Federal Court, and because he was from WA. Heydon virtually auditioned for his job by going on a lecture tour preaching judicial restraint. Kirby suspects he was appointed by Keating in large part to make him shut up about the monarchy. And Edelman just happens to be a good friend of Christian Porter.
And it's not a recent phenomenon, it's always been somewhat political, e.g. Evatt, Barwick, Latham, Isaacs, Murphy, and of course, Barton.