Skip path checks for OpenSSL on macOS 11+

They will fail with the system OpenSSL/LibreSSL install since it isn't
present in the filesystem

oscrypto/__init__.py

@@ -119,11 +119,17 @@ def use_openssl(libcrypto_path, libssl_path, trust_list_path=None):
  if not isinstance(libssl_path, str_cls):
  raise ValueError('libssl_path must be a unicode string, not %s' % type_name(libssl_path))
 
- if not os.path.exists(libcrypto_path):
- raise LibraryNotFoundError('libcrypto does not exist at %s' % libcrypto_path)
+ do_path_checks = True
+ if sys.platform == 'darwin':
+ mac_version_info = tuple(map(int, platform.mac_ver()[0].split('.')[:2]))
+ do_path_checks = mac_version_info < (11,)
 
- if not os.path.exists(libssl_path):
- raise LibraryNotFoundError('libssl does not exist at %s' % libssl_path)
+ if do_path_checks:
+ if not os.path.exists(libcrypto_path):
+ raise LibraryNotFoundError('libcrypto does not exist at %s' % libcrypto_path)
+
+ if not os.path.exists(libssl_path):
+ raise LibraryNotFoundError('libssl does not exist at %s' % libssl_path)
 
  if trust_list_path is not None:
  if not isinstance(trust_list_path, str_cls):