Make macOS depenency clear

diff --git a/README.md b/README.md
index a31bd6c3766bf6cc29f5743fe85059ce34495395..606c4942e2d437f43e9420eec95ad062ad47936e 100644 (file)
--- a/README.md
+++ b/README.md
@@ -69,11 +69,14 @@ prerequisites for building yosys:
                graphviz xdot pkg-config python3 libboost-system-dev \
                libboost-python-dev libboost-filesystem-dev zlib1g-dev
 
-Similarily, on Mac OS X MacPorts or Homebrew can be used to install dependencies:
+Similarily, on Mac OS X Homebrew can be used to install dependencies:
 
        $ brew tap Homebrew/bundle && brew bundle
+
+or MacPorts:
+
        $ sudo port install bison flex readline gawk libffi \
-               git graphviz pkgconfig python36 boost zlib
+               git graphviz pkgconfig python36 boost zlib tcl
 
 On FreeBSD use the following command to install all prerequisites: