diff --git a/docs/Install.osx b/docs/Install.osx
index 044da728..092c1425 100644
--- a/docs/Install.osx
+++ b/docs/Install.osx
@@ -1,140 +1,140 @@
 
 Installation procedure for SIP SIMPLE SDK on MacOSX
 ---------------------------------------------------
 
 Home page: http://sipsimpleclient.org
 
 This document describes the installation procedure on MacOSX >= 10.14
 
 The installation procedure consists of the steps described below:
 
 Step 1. Prerequisites
 Step 2. Install dependencies
 Step 3. Install SIP SIMPLE SDK
 
 
 Step 1. Prerequisites
 ---------------------
 
  * MacOSX >= 10.14
  * Apple Developer tools (XCode 11)
  * MacPorts from https://guide.macports.org
 
 
 Step 2. Install dependencies
 ----------------------------
 
 See Dependencies.txt for detailed description of the required libraries and
 their minimum version number.
 
 A. Install the C dependencies
 
 Install some building tools:
 
-port install darcs pkg-config yasm 
+sudo port install darcs pkg-config yasm 
 
 Install the dynamic libraries required by sipsimple:
 
-sudo port install x264 gnutls openssl sqlite gnutls ffmpeg mpfr libmpc libvpx
+sudo port install x264 gnutls openssl sqlite3 gnutls ffmpeg mpfr libmpc libvpx
 
 If building for the Mac Store or a notarized version a lot more attention is
 required to build all dependencies.  All dynamic libraries must:
 
   1. be signed with an Apple developer account
   2. contain LC_VERSION_MIN_MACOSX option
   3. not load non-system libraries from outside the sandbox
 
 For solving 2) all port packages and their depedencies must be re-compiled from
 sources. First locate all the dependencies of each package:
 
   otool -L /opt/local/lib/XYZ.dylib
 
 For each found dependency, remove the binary package and reinstall the port
 from source:
 
    sudo port uninstall package
    sudo port -s install package
 
 Check if the library contains LC_VERSION_MIN_MACOSX flag, for example:
    
 otool -l /opt/local/lib/libgnutls.dylib |grep -B1 -A3 LC_VERSION_MIN_MACOSX
 Load command 8
       cmd LC_VERSION_MIN_MACOSX
   cmdsize 16
   version 10.11
       sdk 10.14
 
 For solving 3) use install_name_tool as follows:
 
 old_path="/opt/local/lib/\|/usr/local/opt/libmpc/lib/"  # <-- add all native lib paths
 new_path="@executable_path/../Frameworks/" # <- replace with relative path inside sandbox
 
 for library in $@; do
   new_basename=$(basename $library)
   echo $new_basename
   install_name_tool -id $new_path$new_basename $library
   dependencies=$(otool -L $library | grep $old_path | awk '{print $1}')
   for dependency in $dependencies; do
       new_basename=$(basename $dependency)
       new_name="$new_path$new_basename"
       install_name_tool -change $dependency $new_name $library
   done
 done
 
 For example:
 
 otool -L /opt/local/lib/libgnutls.dylib
 	/opt/local/lib/libgnutls.30.dylib (compatibility version 59.0.0, current version 59.1.0)
 	/System/Library/Frameworks/Security.framework/Versions/A/Security (compatibility version 1.0.0, current version 58286.255.3)
 	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1575.17.0)
 	/opt/local/lib/libp11-kit.0.dylib (compatibility version 4.0.0, current version 4.0.0)
 	/opt/local/lib/libidn2.0.dylib (compatibility version 4.0.0, current version 4.7.0)
 	/opt/local/lib/libunistring.2.dylib (compatibility version 4.0.0, current version 4.0.0)
 	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.250.1)
 	/opt/local/lib/libtasn1.6.dylib (compatibility version 13.0.0, current version 13.0.0)
 	/opt/local/lib/libnettle.8.dylib (compatibility version 8.0.0, current version 8.1.0)
 	/opt/local/lib/libhogweed.6.dylib (compatibility version 6.0.0, current version 6.1.0)
 	/opt/local/lib/libgmp.10.dylib (compatibility version 15.0.0, current version 15.1.0)
 	/opt/local/lib/libintl.8.dylib (compatibility version 10.0.0, current version 10.5.0)
 
 
 after running install_name_tool becomes:
 
 otool -L Frameworks/libgnutls.30.dylib 
 	@executable_path/../Frameworks/libgnutls.30.dylib (compatibility version 59.0.0, current version 59.1.0)
 	/System/Library/Frameworks/Security.framework/Versions/A/Security (compatibility version 1.0.0, current version 58286.255.3)
 	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1575.17.0)
 	@executable_path/../Frameworks/libp11-kit.0.dylib (compatibility version 4.0.0, current version 4.0.0)
 	@executable_path/../Frameworks/libidn2.0.dylib (compatibility version 4.0.0, current version 4.7.0)
 	@executable_path/../Frameworks/libunistring.2.dylib (compatibility version 4.0.0, current version 4.0.0)
 	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.250.1)
 	@executable_path/../Frameworks/libtasn1.6.dylib (compatibility version 13.0.0, current version 13.0.0)
 	@executable_path/../Frameworks/libnettle.8.dylib (compatibility version 8.0.0, current version 8.1.0)
 	@executable_path/../Frameworks/libhogweed.6.dylib (compatibility version 6.0.0, current version 6.1.0)
 	@executable_path/../Frameworks/libgmp.10.dylib (compatibility version 15.0.0, current version 15.1.0)
 	@executable_path/../Frameworks/libintl.8.dylib (compatibility version 10.0.0, current version 10.5.0)
 
 
 Building libvpx library
 -----------------------
 
 To obtain LC_VERSION_MIN_MACOSX for libvpx.dylib:
 
 Download the sources of libvpx from github. Run configure, then edit libs.mk and change the
 line:
 
 $(BUILD_PFX)$(LIBVPX_SO): extralibs += -lm
 
 to:
 
 $(BUILD_PFX)$(LIBVPX_SO): extralibs += -lm -mmacosx-version-min=10.11
 
 
 
 Step 3. Install SIP SIMPLE SDK 
 ------------------------------
 
 See Install.linux document
 
 Same steps related to C dependencies must be taken for .so dynamic libraries
 that are part of Python packages on which the SDK depends.