Add binary install steps for Linux/macOS

installation-linux-other.md

@@ -8,6 +8,16 @@ sitemap: true
 Yggdrasil is supported on Linux. You can either [download the latest binary from
 CircleCI](builds.md) or you can build from source.
 
+## Download binaries
+
+Download the relevant Linux `yggdrasil` and `yggdrasilctl` binaries from the
+[Builds](builds.md) page.
+
+Copy these into a suitable location:
+```
+sudo cp {yggdrasil,yggdrasilctl} /usr/local/bin
+```
+
 ## Build from source
 
 Linux has most of the tools needed to build Yggdrasil from source - you just

installation-macos-other.md

@@ -8,6 +8,17 @@ sitemap: true
 Yggdrasil is supported on macOS. You can either [download the latest binary from
 CircleCI](builds.md) or you can build from source.
 
+## Download binaries
+
+Download the relevant macOS `yggdrasil` and `yggdrasilctl` binaries from the
+[Builds](builds.md) page.
+
+System Integrity Protection in macOS prevents you from copying files into
+`/usr/bin`, therefore you should install into `/usr/local/bin`:
+```
+sudo cp {yggdrasil,yggdrasilctl} /usr/local/bin
+```
+
 ## Build from source
 
 macOS has most of the tools needed to build Yggdrasil from source - you just

installation.md

@@ -11,9 +11,9 @@ Installation guides are available for the following platforms/distributions.
 - [Debian, Ubuntu, elementaryOS](installation-linux-deb.md)
 - [Red Hat Enterprise Linux, Fedora, CentOS](installation-linux-rpm.md)
 - [Ubiquiti EdgeOS](installation-linux-edgeos.md)
-- [Other distributions or build from source](installation-linux-other.md)
+- [Manual install or build from source](installation-linux-other.md)
 
 ## macOS
 
 - [macOS installer](installation-macos-pkg.md)
-- [Build from source](installation-linux-other.md)
+- [Manual install or build from source](installation-linux-other.md)