Add MacOS build requirements

README.md

@@ -110,6 +110,24 @@ python -m microraiden.examples.demo_proxy --private-key <private_key_file> start
  * Go to the paywalled resource pages:
     - http://localhost:5000/doggo.jpg
 
+### MacOS build issues with OpenSSL
+
+* if necessary to complete the build, install latest OpenSSL on MacOS
+
+```
+brew update
+brew upgrade openssl
+```
+
+* additional dependency-related build steps on MacOS as necessary:
+
+```
+export CPPFLAGS="-I/usr/local/opt/openssl/include $CPPFLAGS"
+brew install automake
+export LDFLAGS="-L/usr/local/opt/openssl/lib"
+brew install libtool
+```
+
 
 ## How To
 

microraiden/requirements-dev.txt

@@ -1,5 +1,5 @@
 -r requirements.txt
 pytest
-ethereum-tester
+eth-tester
 mock
 requests_mock