[Q] Nexus File access from Recovery topic

Been trying to search this but can't find a way to access my Nexus 6 file system from recovery.

I tried editing my build.prop (phone is rooted, no custom rom) rebooted and now stuck on the Google boot screen with the unlock symbol.

Hoping to restore by file (have backup) rather then reset to default.

Fastboot sees it (mac os) but adb does not)

Any help would be greatly appreciated.