OS X command line installer track progress
You were close - the option you're looking for is -verboseR:

Usage: installer [-help] [-dominfo] [-volinfo] [-pkginfo] [-allowUntrusted] [-dumplog]
             [-verbose | -verboseR] [-vers] [-config] [-plist]
             [-file &lt;pathToFile&gt;] [-lang &lt;ISOLanguageCode&gt;] [-listiso]
             [-showChoicesXML] [-applyChoiceChangesXML &lt;pathToFile&gt;]
             [-showChoicesAfterApplyingChangesXML &lt;pathtoFile&gt;]
             -pkg &lt;pathToPackage&gt;
             -target &lt;[DomainKey|MountPoint]


Here's installer's output installing a Firefox 43.0.1 .pkg built with AutoPkgr with that flag:

timmay:~ da4$ sudo installer -pkg /Users/da4/Desktop/auto/Firefox-43.0.1.pkg -target / -verboseR
installer: Package name is Firefox-43.0.1
installer: Upgrading at base path /
installer:PHASE:Preparing for installation…
installer:PHASE:Preparing the disk…
installer:PHASE:Preparing Firefox-43.0.1…
installer:PHASE:Waiting for other installations to complete…
installer:PHASE:Configuring the installation…
installer:STATUS:
installer:%9.883908
installer:PHASE:Writing files…
installer:%30.674055
installer:PHASE:Writing files…
installer:%51.530939
installer:PHASE:Optimizing system for installed software…
installer:PHASE:Validating packages…
installer:PHASE:Validating packages…
installer:%97.750000
installer:STATUS:
installer:PHASE:Finishing the Installation…
installer:STATUS:
installer:%100.000000
installer:PHASE:The software was successfully installed.
installer: The upgrade was successful.
timmay:~ da4$


I'm not exactly sure when the -verboseR option was added to OS X's installer, but it's present in 10.9+.