License-wise, you certainly are within your rights.
Just remember that your Dell ran the Windows version of the program, and you'll need to install the Mac version on your Mac, of course.
do you by any chance know how to do that or how I would go about doing that?
Isn't the downloaded version platform specific while the disc version can be installed on both?
If you have the boxed version of Premiere Elements 12, you'll find discs for both the Windows and Mac version inside.
If not, you'll need to find another source for the Mac installation files. You can even borrow a copy from someone else, since it's the serial number that makes it your copy.
I had 11 before 12 and I have the cd and box for that still if I put that in and use the serial number for 12 will that work
I think that I am interpreting your question differently and consequently have a different reply related to what I think you are asking.
Consider...what I am reading....
You had Premiere Elements 12 (assumed Windows) on an old Dell laptop and have the installation files for that.
Now you have a new Mac Book Pro, want to install those already purchased Premiere Elements 12 installation file in Mac Book Pro, and want to know how to.
Am I correct or did I misunderstand what you want to do?.
If I understood correctly, then read on
You need to purchase Premiere Elements 12 Mac if still in stock at an authorized reseller
(if you purchase as download, you end up with installation files specific to the computer to which the files were downloaded; if you purchase the product in box packaging, you end up with 2 installations discs, one for Windows and one for Mac. Typically, about same price.
I am strictly and Elements Windows user, so for the specifics on installing Premiere Elements on a Mac computer, I would point you to an Adobe document on that
Please consider. Any questions or need clarification, please do not hesitate to ask.
I did not see the other posts before I posted mine (post 7).
So, I would add to my reply....
If you have the installation discs for a box packaging of Premiere Elements 12, then you should have 2 installation discs, one for Windows and one for Mac.
Typically in such cases, the serial number for Premiere Elements 12 Windows and Premiere Elements Mac are the same. Please make sure that for some reason in your case there are not two labels, each with a different serial number for Windows versus Mac.
If you are not reading the serial number directly from the packaging label, please try to verify your product serial number at Adobe, your account, in the section "My Products".
BTW, just one other thing to note, before you throw at that old Dell.
Premiere Elements' project files are NOT cross-platform. In other words, you will not be able to open a project created in the Windows version on a Mac and vice versa. Just in case you plan to finish up a project your started on your Windows machine on your new Mac.