Unable to import on macOS Big Sur #1885
Description
From #1484 (comment):
vispy/ext/cocoapy.pycallscdll.LoadLibrary(util.find_library('...'))a bunch of times, but ctypes can't find these libraries on Big Sur. On Catalina,util.find_library('objc')returns/usr/lib/libobjc.dyliband on Big Sur,util.find_library('objc')returnsNone. These are all the libraries loaded incocoapy.py:
- objc
- CoreFoundation
- AppKit
- quartz
- CoreText
- Foundation
https://docs.python.org/3/library/ctypes.html#finding-shared-libraries
https://docs.python.org/3/library/ctypes.html#ctypes.LibraryLoader.LoadLibrary
Reproduction
python3 -m pip install vispypython3 -c "import vispy"; the output is:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/tmp/venv/lib/python3.8/site-packages/vispy/__init__.py", line 30, in <module>
from .util import config, set_log_level, keys, sys_info # noqa
File "/private/tmp/venv/lib/python3.8/site-packages/vispy/util/__init__.py", line 14, in <module>
from . import fonts # noqa
File "/private/tmp/venv/lib/python3.8/site-packages/vispy/util/fonts/__init__.py", line 13, in <module>
from ._triage import _load_glyph, list_fonts # noqa, analysis:ignore
File "/private/tmp/venv/lib/python3.8/site-packages/vispy/util/fonts/_triage.py", line 14, in <module>
from ._quartz import _load_glyph, _list_fonts
File "/private/tmp/venv/lib/python3.8/site-packages/vispy/util/fonts/_quartz.py", line 12, in <module>
from ...ext.cocoapy import cf, ct, quartz, CFRange, CFSTR, CGGlyph, UniChar, \
File "/private/tmp/venv/lib/python3.8/site-packages/vispy/ext/cocoapy.py", line 1126, in <module>
NSEventTrackingRunLoopMode = c_void_p.in_dll(
ValueError: dlsym(RTLD_DEFAULT, NSEventTrackingRunLoopMode): symbol not found
See napari/napari#1393 and #1484.