From a QCAD user:
I have an Apple computer with an M1 or M2 chip. Which package should I download?
QCAD Professional 3.28.1 (e) for macOS 11.x, 12.x, 13.x arm64 (M1/M2, NOT for regular Intel Macs!)
or
QCAD Professional 3.28.1 (f) for macOS Qt 6 11.x, 12.x, 13.x arm64 (M1/M2, NOT for regular Intel Macs!)