![]() You're likely using a Core 2 Duo machine." Var_ID=$(ioreg -p IODeviceTree -r -n / -d 1 | grep board-id)Įcho -e "Awesome your ID should work!\n\nYour ID : $var_ID\nOld ID : Mac-35C1E88140C3E6CF\n"Įcho -e "Sadly the ID is too short. Osascript -e 'tell app "loginwindow" to «event aevtrrst»' ![]() Sudo chflags uchg /System/Library/CoreServices/boot.efiĮcho -e "Done!\n\nNow all you need to do is reboot twice." Sudo chown root:wheel /System/Library/CoreServices/boot.efi Sudo chmod 644 /System/Library/CoreServices/boot.efi Sudo mv /tmp/_boot.efi /System/Library/CoreServices/boot.efiĮcho -e "Adjusting permissions and locking boot.efi" Sudo perl -pe 'chomp if eof' /tmp/_boot.efi > /tmp/_boot.efi Sudo mv /System/Library/CoreServices/boot.efi /tmp/_boot.efi Sudo chflags nouchg /System/Library/CoreServices/boot.efiĮcho -e "Backing up boot.efi to ~/Desktop/boot$.efi First, you need to get the board id of your Mac model.ĮDIT: Thanks to w0lf, here is a script you can use to tell you your board id:Įcho -e "Now you'll need to enter your password for some sudo commands\n" So basically, what we will be doing is changing one of the "supported" board id's to our own to trick it into thinking our Mac is supported.ġ. What this hack does is it simply checks the board id of your Mac to determine if it supports the black boot screen. Alpha for explaining how boot.efi determines whether to use a black or white boot screen, as seen here: Also, thanks to VanillaCracker who explained how he got this to work on his 2012 Mac Mini in that same thread. however I have done my best to make this guide as fool-proof as possible so even if you have no terminal knowledge you should be able to do it.įirst off, I would like to thank Pike R. Preferably some basic terminal knowledge. To get the black Yosemite screen again, just reboot into your Yosemite partition twice. On the next boot, you will have your white screen back in both pre-10.10 and 10.10 versions. IMPORTANT NOTE: If you boot back into an older version of OS X after doing this, it will boot with a completely black screen. If you want to see what the current script is doing, you can open it in a text editor. I have left it here for informational purposes. The following method is how to do this manually, but it's outdated so it won't work on current versions of Yosemite.
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