MacOS, with a slight help from MS, very, very nearly tipped the balance to Pascal in the 80s. I dare say that without C++ hitting mainstream around 1990, C would have languished.
Turbo Pascal was responsible for the Pascal success. And then came delphi along and somehow lost against Visual Basic.
Some chunks of Windows were also written in Pascal, using Microsoft Pascal which they'd been using since their CP/M days.
The rest of the world looked very differently at that time, and compared to mac had much better development environment.
MacApp was the framework Apple wrote and promoted, but it wasn’t the primary API; lots of developers wrote directly for the Mac Toolbox or used any of a number of other frameworks like THINK Class Library.