You will cut through the black border of the iMac and end up with what look like scratches under the screen when you use the iMac.I also had to install all of these onto the screen instead of onto the computer, as recommended to install both sides and the top adhesive tape.
I did this because the nice plastic backing material didn't pull off if I installed them onto the computer as recommended.Basically, I got it to work, but it didn't work well for my iMac 2015 in 27" nearly as well as good quality tape made for my computer.
The filament on this product was great, the pieces lined up perfectly, but it was not possible to separate the bottom plastic layer on those two sections.
The product was excellent but I have to figure out how to install it.
Fit and finish was just what I needed to complete an ssd upgrade in my imac.
The labeling on the pieces do not match what is in the product picture.
I bought two separate kits - both failed and my 27-inch A1419 screen fell off.
We spent considerable time doing this job right.These strips are cheap and the adhesive does not stick.
We purchased this item and it was installed it on a 27" IMAC.
If the LCD would have hit her desk, it would have not only broke the display, the cabling would have pulled the motherboard right out of the computer.Not recommending this item at all!