I pulled this from the /var/log/install.log
Jul 26 12:22:38 Mac-Marion.local installd[634]: PackageKit: Will do receipt-based obsoleting for package identifier com.apple.pkg.MacBookProEFIUpdate (prefix path=/)
Jul 26 12:22:38 Mac-Marion.local installd[634]: PackageKit: Extracting file://localhost/Library/Updates/041-4689/MacBookProEFIUpdate.pkg (destination=/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/Cleanup At Startup/PKInstallSandboxManager/1.sandbox/Root, uid=0)
Jul 26 12:22:48 Mac-Marion.local installd[634]: PackageKit: Executing script "preinstall" in /private/tmp/PKInstallSandbox.w8Ud5g/Scripts/com.apple.pkg.MacBookProEFIUpdate. RygSxb
Jul 26 12:22:48 Mac-Marion.local _spotlight[736]: Begin script: removeOldEFI
Jul 26 12:22:49 Mac-Marion.local _spotlight[739]: End script: removeOldEFI
Jul 26 12:22:49 Mac-Marion.local installd[634]: PackageKit: Executing script "postinstall" in /private/tmp/PKInstallSandbox.w8Ud5g/Scripts/com.apple.pkg.MacBookProEFIUpdate. RygSxb
Jul 26 12:22:49 Mac-Marion.local _spotlight[746]: Begin script: blessEFI
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: EFI found at IODeviceTree:/efi
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: Creating /Volumes/bless.YeEV//EFI/APPLE/FIRMWARE if needed
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: Deleting previous contents of /Volumes/bless.YeEV//EFI/APPLE/FIRMWARE
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: Deleting /Volumes/bless.YeEV//EFI/APPLE/FIRMWARE/MBP61_0057_0FB_LOCKED.scap (4260464 bytes)
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: Opened dest at /Volumes/bless.YeEV//EFI/APPLE/FIRMWARE//MBP61_0057_0FB_LOCKED.scap for writing
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: preallocation not supported on this filesystem for /Volumes/bless.YeEV//EFI/APPLE/FIRMWARE//MBP61_0057_0FB_LOCKED.scap
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: /Volumes/bless.YeEV//EFI/APPLE/FIRMWARE//MBP61_0057_0FB_LOCKED.scap created successfully
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: Relative path of /Volumes/bless.YeEV//EFI/APPLE/FIRMWARE//MBP61_0057_0FB_LOCKED.scap is \EFI\APPLE\FIRMWARE\MBP61_0057_0FB_LOCKED.scap
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: Setting EFI NVRAM:
Jul 26 12:22:50 Mac-Marion.local installd[634]: postinstall: 2 : <CFString 0x1030e0eb0 [0x7fff73380190]>{contents = "efi-apple-recovery"} = <CFString 0x7f835b103180 [0x7fff73380190]>{contents = "<array><dict><key>IOMatch</key><dict><key>IOProviderClass</key><string>IOMedia </string><key>IOPropertyMatch</key><dict><key>UUID</key><string>000006A2-504D-00 00-5377-000003130000</string></dict></dict><key>BLLastBSDName</key><string>disk0 s1</string></dict><dict><key>IOEFIDevicePathType</key><string>MediaFilePath</str ing><key>Path</key><string>\EFI\APPLE\FIRMWARE\MBP61_0057_0FB_LOCKED.scap</strin g></dict></array>"}
Jul 26 12:22:50 Mac-Marion.local _spotlight[755]: End script: blessEFI
Jul 26 12:22:50 Mac-Marion.local installd[634]: PackageKit: Writing receipt for com.apple.pkg.MacBookProEFIUpdate to /private/var/db/receipts
Jul 26 12:22:50 Mac-Marion.local installd[634]: Installed "MacBook Pro-EFI-firmware-updater" (2.6)
Jul 26 12:25:51 Mac-Marion.local Software Update[284]: SUAppStoreUpdateController: proceed with scan based on intervening install (including MacBook Pro-EFI-firmware-updater at 2012-07-26 10:22:50 +0000) (last scan: 2012-07-26 10:03:20 +0000)