It depends on your risk-tolerance.
That estimate may or may not be based on a representative sample of recent, accurate data.
Even if it is, schools like Macalester don’t base their decisions on stats alone.
I’d be skeptical that someone can generate a reliable prediction from test scores alone.
“77%” surely is an overly precise number.
For several peer schools (Barnard, Colby, Colorado College, Grinnell, Oberlin) the collegesimply.com estimate is in the 50%-70% range. Macalester is similar to those schools in average SAT scores and HS class rank.
Especially for expensive colleges with holistic admissions, before even taking financial aid into account, that range doesn’t look “safe” to me.