If your Mac isn't listed above, and it was released before June 13, 2016, it isn't compatible with OS X El Capitan (10.11). OS X El Capitan Features Compatibility All of the above Macs support the operating system interface refinements as well as the updated Safari, Mail, Notes, and Spotlight applications.

Mac Pro 2006 1,1 El Capitan Upgrades Upgrades I have completed on the Apple Mac Pro 1,1 in order to get it El Capitan (OS X 10.11) ready along with code, scripts and links to products and utilities. ##Install El Capitan from Spare Mac • Attach the Mac Pro boot drive to a Mac. • Download El Capitan from the App Store on this Mac. • Run Disk Utility and wipe the destination drive, making sure to used GUID partition table. • Run the El Capitan installer and make sure to select the Mac Pro drive.

##Prepare the New Drive • Boot from the new El Capitan drive in restore mode with cmd+R • Run terminal app • type csrutil disable; reboot (this reboots the Mac) • Once booted, download the • Run the script to fix permissions on boot.efi • The script will also Replace CoreServices and /User/boot/32 with the new ##Install Nvidia Drivers (If Needed) If you are planning on using newer Nvidia cards, make sure to download. The postinstall.sh script does this by default. You may want to disable that functionality. ##Migrate the Drive • Shut down the computer you are using to make the drive • Insert the El Capitan drive in your Mac Pro 1,1 (2006) • Boot the Mac • You will hear it chime twice, this means you've done your job! • If all goes well, you'll see it boot (if not, make sure you've used GUID partition type - this happened to me:) ) • If you're using a PC graphics card, it might take 2 minutes to boot up to the login screen ##Useful Links • • • • • [RAM from Komputerbay (x2 kits)]( ref=sr_1_6?s=electronics&ie=UTF8&qid=&sr=1-6) • • • •.