it would appear that "macro evolution" has been understood as a complete species change from one species to another, and not cross breed-able.
micro evolution seems to be defined as evolutionary adaptions by a species to adjust to environments.
my thoughts (since you want a creationist opinion:
either stage either is a stage of evolution , or is not.
i believe its possible for one species to be born of another and not crossbreed-able with the original species, for the simple reason of the "apparent" evolution of the dog.
if the evolution of the dogs breeds means its possible over time for the dogs form to no longer be compatible with its original form of wolf. (teacup poodle, and wolf, crossbreed-able? related?
who coined the term macro evolution? i cant define a word that doesn't have an apparent definition, i had believed macro evolution meant broad scale evolution of all species on the planet at once, and micro meaning small scale evolutionary changes of species in different environments, but not global scale evolutions all at once.
this then is a "creationist standpoint" on these terms.
to conclude: God has set the evolutions and adaptions by his laws, since all that is was established by him, and science just observes the establishment. micro or macro evolution does not take away nor add to the truth that God is, but rather is an exploration of the laws of nature as he set them. the bibles reference says he created it all, but does not explain his methods in full.
keep your mind from this way of enquiry, for never will you show that not-being is ~parmenides