Updated build mac-os instruction like (#318)

Updated macOS build instruction

doc/build-macos.md

@@ -16,33 +16,43 @@ Then install [Homebrew](http://brew.sh).
 Dependencies
 ----------------------
 
-    brew install automake berkeley-db4 libtool boost miniupnpc openssl pkg-config protobuf python3 qt libevent
+    brew install automake berkeley-db4 libtool boost miniupnpc openssl pkg-config protobuf python qt libevent qrencode
 
-If you want to build the disk image with `make deploy` (.dmg / optional), you need RSVG
+In case you want to build the disk image with `make deploy` (.dmg / optional), you need RSVG
 
-    brew install librsvg
+      brew install librsvg
+      
+Berkley DB
+------------------------
+It is recommended to use Berkeley DB 4.8. If you have to build it yourself, you can use [the installation script included in contrib/] (https://github.com/bitcoin/bitcoin/blob/master/contrib/install_db4.sh)like so:
+    ./contrib/install_db4.sh .
 
-NOTE: Building with Qt4 is still supported, however, could result in a broken UI. Building with Qt5 is recommended.
+from the root of the repository.
 
+Note: You only need Berkeley DB if the wallet is enabled (see Disable-wallet mode).
+
+
 Build Zcoin Core
 ------------------------
 1.  Build Zcoin-core:
 
-    Configure and build the headless bitcoin binaries as well as the GUI (if Qt is found).
-
+    Configure and build the headless zcoin binaries as well as the GUI (if Qt is found).
+
+    In case you want to build the disk image with `make deploy` (.dmg / optional), by passing `--with-gui` to configure.
+
     You can disable the GUI build by passing `--without-gui` to configure.
 
         ./autogen.sh
-        ./configure --with-boost-libdir=/usr/local/Cellar/boost/1.66.0/lib
+        ./configure
         make
 
 2.  It is recommended to build and run the unit tests:
 
-        make check
-
-3.  You can also create a .dmg that contains the .app bundle (optional):
+       ` make check`
+        
+3.   You can also create a .dmg that contains the .app bundle (optional):
 
-        make deploy
+       ` make deploy`
 
 
 Running
@@ -89,6 +99,7 @@ Uncheck everything except Qt Creator during the installation process.
 Notes
 -----
 
-* Tested on OS X 10.11 through 10.12 on 64-bit Intel processors only.
+* Tested on macOS 10.11 through 10.14 on 64-bit Intel processors only.
 
 * Building with downloaded Qt binaries is not officially supported. See the notes in [#7714](https://github.com/bitcoin/bitcoin/issues/7714)
+