Paul - thanks, I was able to use Terminal to allow to execute svl and the svl image tuned black. Trying to upload Blink to the Artemis ATP board with Sparkfun Variable Loader 57600 baud rate. The upload process stopped at line 38 (see error message below).
An error occurred while uploading the sketch
[27881] Failed to execute script svl
Traceback (most recent call last):
File “svl.py”, line 38, in
File “”, line 983, in _find_and_load
File “”, line 967, in _find_and_load_unlocked
File “”, line 677, in _load_unlocked
File “/Users/runner/hostedtoolcache/Python/3.7.8/x64/lib/python3.7/site-packages/PyInstaller/loader/pyimod03_importers.py”, line 623, in exec_module
File “site-packages/serial/tools/list_ports.py”, line 29, in
File “”, line 983, in _find_and_load
File “”, line 967, in _find_and_load_unlocked
File “”, line 677, in _load_unlocked
File “/Users/runner/hostedtoolcache/Python/3.7.8/x64/lib/python3.7/site-packages/PyInstaller/loader/pyimod03_importers.py”, line 623, in exec_module
File “site-packages/serial/tools/list_ports_posix.py”, line 31, in
File “”, line 983, in _find_and_load
File “”, line 967, in _find_and_load_unlocked
File “”, line 677, in _load_unlocked
File “/Users/runner/hostedtoolcache/Python/3.7.8/x64/lib/python3.7/site-packages/PyInstaller/loader/pyimod03_importers.py”, line 623, in exec_module
File “site-packages/serial/tools/list_ports_osx.py”, line 32, in
ValueError: dlsym(RTLD_DEFAULT, kIOMasterPortDefault): symbol not found
As a side note on a Win10 I am able to get Blink to complete a SVL upload at 57600 baud. So is my Mac issue with OS 11.2?