I am up against the same issue. I need to read and write serial data plus control RTS and DTR lines to write to the flash memory of a processor on a proprietary device.
The "open(fd,flags)" function fails when sandbox is enabled. It works properly when sandbox is disabled. Without sandbox, it appears that I cannot validate the app. I am in the middle of a Catch-22
AuldGeek
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
Post
Replies
Boosts
Views
Activity
I've run into a similar problem. I am developing an app which will flash the memory of a device which I designed through the usbserial driver.
I can see the device as a usbserial device in the system report.
I can retrieve the device name and display it as a choice (the only choice in this case) of an available port.
When I try to open the port, the app fails.
When I disable SandBox, the port opens properly and the flash operation continues as expected.
OS 13.4 XCode 14.3.1