Search for correct library extension on mac os

jmbitcoin/jmbitcoin/__init__.py

@@ -5,7 +5,11 @@ import coincurve as secp256k1
 # if not, it is assumed to be present at the system level
 # See: https://github.com/Simplexum/python-bitcointx/commit/79333106eeb55841df2935781646369b186d99f7#diff-1ea6586127522e62d109ec5893a18850R301-R310
 import os, sys
-expected_secp_location = os.path.join(sys.prefix, "lib", "libsecp256k1.so")
+if sys.platform == "darwin":
+    secp_name = "libsecp256k1.dylib"
+else:
+    secp_name = "libsecp256k1.so"
+expected_secp_location = os.path.join(sys.prefix, "lib", secp_name)
 if os.path.exists(expected_secp_location):
     import bitcointx
     bitcointx.set_custom_secp256k1_path(expected_secp_location)