log: add page (#6316)

pages/osx/log.md

@@ -0,0 +1,20 @@
+# log
+
+> View, export, and configure logging systems.
+> More information: <https://www.dssw.co.uk/reference/log.html>.
+
+- Stream live system logs:
+
+`log stream`
+
+- Stream logs sent to `syslog` from the process with a specific PID:
+
+`log stream --process {{process_id}}`
+
+- Show logs sent to syslog from a process with a specific name:
+
+`log show --predicate "process == '{{process_name}}'"`
+
+- Export all logs to disk for the past hour:
+
+`sudo log collect --last {{1h}} --output {{path/to/file.logarchive}}`