First, sorry to be such a pest... https://support.apple.com/en-us/HT204350 (Move your content to a new Mac) Is not very specific. I made a CC Clone of my source iMac (10.7.5) to a volume on a USB 3.0 HDD (because my late 2006 20" iMac only has FW400 or USB 2.0 and would take forever to Migrate (MA) the 180 GB of content.) I read that already having a User set up (like I do) on the target Mini will cause permissions problems when MA transfers the source primary User (coded 501) to the target that already has a primary 501 User. DO I somehow delete the User on the Target? DO I need to wipe the drive and reinstall El Capitan? ( I did save a copy of El Capitan Install disk to a volume on the external HDD before installing it on the Mini. I hope it is valid ;o) Connect the computers to each other Connect both computers to the same local Wi-Fi or Ethernet network. Or connect both computers directly using a Thunderbolt, FireWire, or Ethernet cable. Or connect your new Mac to a Time Capsule or external drive that has a Time Machine backup of your old Mac. Does CC clone on external HDD work exactly the same? Use Migration Assistant On your old Mac: If you're using a FireWire cable to connect the computers, start up your old Mac in target disk mode. If you're using a Thunderbolt cable to connect them, and your old Mac is using OS X Mountain Lion v10.8 or earlier, start up your old Mac in target disk mode. In all other cases, start up your old Mac normally. W/ external USB HDD as source, would it just mean have HDD connected to target Mini with all volumes visible and then MA lets you select a source volume? On your new Mac: Open Migration Assistant, which is in the Utilities folder of your Applications folder. Click Continue. When asked how you want to transfer your information, select the option to transfer 'From a Mac, Time Machine backup, or startup disk'. Will this work for my CC Clone in a volume of extern. HDD? Click Continue. Thanks for any specifics or links to specifics of MA from CC Clone and the already existing User on the Target Mini.