With Arial:

\definefontfamily[mainface][rm][Arial]
\setupbodyfont[mainface,10pt]


with Optima:

\definefontfamily[mainface][rm][Optima]
\setupbodyfont[mainface,10pt]

It doesn’t matter if the font statements are before or after \starttext

Then I thought, let’s test some other things. I logged in as another user, and used ConTeXt from TeX Live 2019:

It seems to be that on my system, the standalone installed ConTeXt does not work with Optima, but the TeX Live installed one does.

G



On 24 Apr 2020, at 08:09, Henning Hraban Ramm <texml@fiee.net> wrote:



Am 24.04.2020 um 05:19 schrieb kaddour kardio <kaddourkardio@gmail.com>:

It's noticed that Optima is a Sans Serif font.
Maybe it conflicts with MacOS way to handle fonts.

No, ConTeXt doesn’t care what kind of font you define as rm/ss/tt, and the OS has no say in that.

Best, Hraban

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