Here's my syslog from the install failure:
Oct 22 08:10:49 RCB-MAC fseventsd[47] <Critical>: Logging disabled completely for device:1: /Volumes/avast! Free
Oct 22 08:11:00 RCB-MAC kernel[0] <Debug>: CODE SIGNING: cs_invalid_page(0x1000): p=225[ksadmin] clearing CS_VALID
Oct 22 08:11:02 RCB-MAC gcapi[224] <Warning>: can_install: 0, reasons 1
Oct 22 08:11:02 RCB-MAC Installer[219] <Warning>: Chrome already installed
Oct 22 08:11:02 RCB-MAC Installer[219] <Warning>: CoreAnimation: warning, deleted thread with uncommitted CATransaction; set CA_DEBUG_TRANSACTIONS=1 in environment to log backtraces.
--- last message repeated 2 times ---
Oct 22 08:11:17 RCB-MAC coreservicesd[61] <Error>: Application App:"Installer" [ 0x0/0x17017] @ 0x0x7fea8d1003a0 tried to be brought forward, but isn't in fPermittedFrontASNs ( ( ASN:0x0-0x19019:) ), so denying.
Oct 22 08:11:17 RCB-MAC WindowServer[111] <Warning>: [cps/setfront] Failed setting the front application to Installer, psn 0x0-0x17017, securitySessionID=0x186a2, err=-13066
Oct 22 08:11:46 RCB-MAC Installer[219] <Warning>: CoreAnimation: warning, deleted thread with uncommitted CATransaction; set CA_DEBUG_TRANSACTIONS=1 in environment to log backtraces.
Oct 22 08:11:46 RCB-MAC Installer[219] <Warning>: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.
