Howdy folks, So I know there have been many threads about this, and trust me I've been through them all. None of the solutions I have seen have worked so far. Here is the problem. I was able to install 10.10 on my MacPro1,1 today. I realize this isn't a supported Mac... But I did some hardware modification on it and tweaked the installer to allow it to accept the boardID of my Pro. Regardless, I did a fresh install, wiped the drives, and drag and dropped all my data from a TM backup. Well, I needed some of the plist files in the library folder on my backup (specifically for iPhoto and iTunes) so I had to "show all hidden files" to get that folder showing since Apple has had that folder hidden for a while now. Well, after doing all the data migration manually, I attempted to re-hide all the system/user folders that should be, but the terminal commands just don't seem to be working! Let me tell you what I've done to repair the problem: - used the basic terminal command we all know and love defaults write com.apple.finder AppleShowAllFiles FALSE && killall Finder - I also tried the boolean command defaults write com.apple.finder AppleShowAllFiles -bool FALSE - I've used various capitals and lowercase of that command to rule out that possibility. I logged in/out several times, rebooted several times. - Boot to a safe/known-good environment, reset disk permissions and repaired disk - I created a new "Admin" user, logged into it -- all files are hidden. So it's not a system problem, just a user problem. - I even replaced my entire Library folder with a fresh library folder from a new user account. Aside from messing with my iCloud/keychain, that didn't help either. - It should be noted that I can hide and unhide any files/folders that are NOT supposed to be hidden. For example, I have a PDF on my desktop which is by default not hidden. I am able to use the chflags command to hide and then unhide the file. The chflags/ShowAllFiles commands do not work for files which are, by default, SUPPOSED to be hidden. I am completely stumped. I am ready to use the "chflags hidden" terminal command to hide each file manually. But I feel like that is a bandaid over a bullet hole. Any suggestions on how to re-hide all my hidden files? I'm starting to feel like this is a consequence of me forcing my older Pro to run Yosemite haha... Thanks in advance!