docs(README): link to instructions for OSX building

README.md

@@ -17,14 +17,15 @@ running on all major platforms.**
 ----
 
 * **Windows**:
-  - [**64 bit installer**] - [*signature*](https://qtox-win.pkg.tox.chat/qtox/win64/setup-qtox.exe.asc)
-  - [**32 bit installer**] - [*signature*](https://qtox-win.pkg.tox.chat/qtox/win32/setup-qtox.exe.asc)
+  - **[64 bit installer]** - [*signature*](https://qtox-win.pkg.tox.chat/qtox/win64/setup-qtox.exe.asc)
+  - **[32 bit installer]** - [*signature*](https://qtox-win.pkg.tox.chat/qtox/win32/setup-qtox.exe.asc)
   - [**64 bit portable**](https://build.tox.chat/job/qTox_build_windows_x86-64_release/lastSuccessfulBuild/artifact/qTox_build_windows_x86-64_release.zip)
   - [**32 bit portable**](https://build.tox.chat/job/qTox_build_windows_x86_release/lastSuccessfulBuild/artifact/qTox_build_windows_x86_release.zip)
 * **Linux**:
   - [**CentOS, Debian, Fedora, openSUSE, Ubuntu**](https://software.opensuse.org/download.html?project=home%3Aantonbatenev%3Atox&package=qtox)
   - [other](/INSTALL.md#linux)
 * **Mac**:
+  - **[Building instructions]**
   - [**Experimental download**](https://github.com/qTox/qTox/releases/latest)
 * **FreeBSD**:
   - [**Port**](/INSTALL.md#freebsd-easy)
@@ -96,8 +97,9 @@ There are [IRC logs] available.
 
 
 [#qtox@freenode]: https://webchat.freenode.net/?channels=qtox
-[**64 bit installer**]: https://build.tox.chat/view/qtox/job/qTox_pkg_windows_x86-64_stable_release/lastSuccessfulBuild/artifact/setup-qtox.exe
-[**32 bit installer**]: https://build.tox.chat/view/qtox/job/qTox_pkg_windows_x86_stable_release/lastSuccessfulBuild/artifact/setup-qtox.exe
+[64 bit installer]: https://build.tox.chat/view/qtox/job/qTox_pkg_windows_x86-64_stable_release/lastSuccessfulBuild/artifact/setup-qtox.exe
+[32 bit installer]: https://build.tox.chat/view/qtox/job/qTox_pkg_windows_x86_stable_release/lastSuccessfulBuild/artifact/setup-qtox.exe
+[Building instructions]: /INSTALL.md#os-x
 [Coding]: https://github.com/qTox/qTox/blob/master/CONTRIBUTING.md#how-to-start-contributing
 [easy issues]: https://github.com/qTox/qTox/labels/E-easy
 [IRC logs]: https://github.com/qTox/qtox-irc-logs