After some minutes it should show 'Flash complete!' and you can close the program. Now, just click the 'Flash!' button and wait. (This will erase ALL data on the drive, so backup your data if you have any!) It should be selected as your USB, if not, plug in the USB Device where you want to burn it. Next, Select the Drive where you want to burn it. Just click on 'Select Image' button and browse your file system and click on the ISO you want to burn (Ubuntu). Download Etcher and burn the ISO to the Flash Driveĭownload Etcher and open it. You'll need a 2 GB USB Drive to put the Ubuntu ISO on it, but I would use an 4GB one, for extra space.ġ. It's compatible with Mac OS X (which you are probably using). iso files, you need to burn them to an USB drive. If you're following the technique I've outlined, it's wise to try booting from the new external SSD before installing it internally, just to make sure the computer recognizes the drive as bootable.I think you didn't install Ubuntu, you just downloaded the ISO. That way, once you restart the reassembled computer, you can at least be sure that there's a drive with a bootable operating system available. then open up the computer and swap the drives.clone the operating system+user data from the internal HD to the external SSD using Disk Utility, SuperDuper! or Carbon Copy Cloner (you can also do a clean operating system install by downloading an installer from the App Store and installing it on the new drive).attach the SSD as an external drive first through USB/FireWire/ Thunderbolt.What steps have you already taken? If you can give us a detailed list of the things you've already done, in order, it will be easier to determine where the problem is.Ī common technique to replace an internal boot HD with an SSD would be to: Of course, if the way you installed this SSD was to remove the previous internal HD and install the SSD in its place, without formatting the new SSD and installing a bootable operating system first, then there's no operating system or formatting utility at all. Unless the operating system on the old boot drive posts a dialog box offering to format the unrecognized drive, the computer doesn't 'detect' anything because there isn't anything the operating system can speak to yet.

A new internal drive normally ships unformatted.

Mac disk image not recognized