Good day, As the title says, has any of you noticed a Boot ROM/EFI version upgrade after updating to 10.10.4? According to the changelogs, 10.10.4 fixed quite some EFI holes, but I'm not sure whether all Macs receive EFI updates to patch the hole. As far as I have noticed, my old 2011 15" didn't undergo an EFI upgrade, but my late-2013 13" did. Additional note for late-2013 13" rMBP owners: My own late-2013 13" now has a boot ROM of MBP111.0138.B15. However, on Apple's support website (https://support.apple.com/en-us/HT201518), this is the EFI for the mid-2014 13". The late-2013 13" is supposed to have a firmware of MBP112.0138.B15. Downloading it manually didn't work as the installer only runs on ML or Mavericks. Edit: Just realized that the webmaster maintaining the EFI page may have had a typo. Late-2013/mid-2014 13" rMBPs should have a firmware starting with MBP111, while 15" models from the two model years should have a firmware starting with MBP112, since the first group of alphanumeric characters is basically the model identifier.