IDLE Default Working Directory

[Bev in TX]

On Nov 12, 2018, at 9:16 AM, eryk sun <eryksun at gmail.com> wrote:
> 
> On 11/12/18, Christman, Roger Graydon <dvl at psu.edu <mailto:dvl at psu.edu>> wrote:
>> 
>> I looked in IDLE's own configuration menu, and didn't see anything there --
>> and I fear that I might have to fight some Windows settings somewhere else
>> instead.   I think this is Windows 10.
> 
> Modify the "Start in" field of the IDLE shortcut. You can use
> environment variables, e.g. "%UserProfile%\Documents".

I am not the OP and I’m on macOS — no shortcuts.  How would one do the same thing on other platforms?
Bev in TX