P: .ico file format support

I would complain to Adobe about this. Make a video and post it to YouTube. Tell them that you will publically tarnish them if they don't fix this.

Than use the free website to drag and drop files that I provided you, that works. I am not a tech nor do I work for Adobe. Why don't you call adobe to help you? Please stop emailing me.

The information on the above post is from 2011.  I am using the latest version of Photoshop CC.   I added the ICO file as instructed.  The "Save As" option list does not list .ico 

I just told you how to do this. Please read above. 

I am unable to save a file in the .ico format

I made a comment for you just below. You either have to install the .ico file format plugin in your Photoshop plugins folder or go to a free website and have it convert a .png image for you. 

I wish Adobe would build in support right into the app, they have never had this which is very dumb.

The .ico file format is a Photoshop plugin where you need to install the plugin in your app folder on the Mac or PC. Once installed it will be an option under save as. It has to be saved at specific dimensions. Here is a link to instructions:
https://www.question-defense.com/2011/03/01/photoshop-ico-plugin-how-to-open-windows-icon-files-in-photoshop

You can also use a free website where you drag and drop a transparent PNG image into a website box and have it generate the .ico file for you to use on your website. This site is found here: https://www.convertico.com/

I've had the same issue, but I still have my cs6. how did you save as .ico?

.ico files are the little logo's on the tab's of the websites you visit. Photoshop CS6 had the option to save as .ico, but tech support just informed me that CC has no such option. As a web developer I don't feel like I should be paying for a service that is costing me time and money to do less than the software did that I only had to pay for once.

THANK YOU!! I am feeling the EXACT same way, and plan on writing something very similar to your comment here.. I have been searching for hours trying o get a solution on saving .ico files on my windows10 PC... NOTHING! And yes, I tried the 3rd party plugin thing, didn't work... So, yeah, they most DEFINITELY should have it built in to the software already!