TeXShop vervsion 4.51 supports both Intel and Arm CPUs, Mojave through Big Sur.
TeXShop is a free LaTeX and TeX previewer and editor for macOS, written in Cocoa. Since pdf is a native file format on OS X, TeXShop uses pdftex and pdflatex rather than tex and latex to typeset in its default configuration. These programs in the standard TeX Live distribution of TeX produce pdf output instead of dvi output.
TeXShop uses TeX Live, a standard distribution of Tex programs maintained by the TeX Users Group (TUG) for Mac OS X, Windows, Linux, and various other Unix machines. The distribution includes tex, latex, dvips, tex fonts, cyrillic fonts, and virtually all other programs and supporting files commonly used in the TeX world.