As per Apple s documentation:

1. In the project navigator, select your project.
2. Select your target.
3. Select the "Build Phases" tab.
4. Open "Link Binaries With Libraries" expander.
5. Click the + button.
6. Select your framework.
7. (optional) Drag and drop the added framework to the "Frameworks" group.

I just added the existing framework folder manually into the project navigator. It worked for me.

Follow the below five steps to add a framework in your project.

1. Click on Project Navigator.
2. Select Targets (Black arrow in the below image).
3. Select Build phases ( Blue arrow in the below image).
4. Click on the + button (Green arrow in below image).
5. Select your framework from the list.

Here is the official Apple page.

Another easy way to do it so that it is referenced in the project folder you want, like "Frameworks", is to:

1. Select "Show the Project navigator"
2. Right-click on the project folder you wish to add the framework to.
3. Select Add Files to "YourProjectName"
4. Browse to the framework - generally under /Developer/SDKs/MacOSXversion.sdk/System/Library/Frameworks
5. Select the one you want.
6. Select "Add"

It will appear in both the project navigator where you want it, as well as in the "Link Binary With Libraries" area of the "Build Phases" pane of your target.

The frameworks directory is as follows in my computer:

/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/System/Library/Frameworks

Not the directory

/Developer/SDKs/MacOSXversion.sdk/System/Library/Frameworks

In Project:

1. Select the project navigator
2. Click on Build Phases
3. Click on link binary with libraries
4. Click on the + button and add your Frameworks

Follow the screenshots:

You are ready to go!

1. In the project navigator, select your project.

2. Select your target.

3. Select the "Build Phases" tab.

4. expander. Click the + button.

5. Select your framework.

6. (optional) Drag and drop the added framework to the "Frameworks" group.

   

Xcode 12

Just drag it into the Frameworks, Libraries, and Embedded Content of the General section of the Target:

Done!

_{Note that Xcode 11 and 10 have a very similar flow too.}

Xcode add a framework

Starting Xcode v11 you should use

<Project settings> -> <App Target> -> Frameworks, Libraries, and Embedded Content
//or
<Project settings> -> <Framework Target> -> Frameworks and Libraries

[Xcode pre-v11. Embedded Binaries vs Linked Frameworks and Libraries]

[Xcode v11. Frameworks, Libraries, and Embedded Content plus Frameworks and Libraries with Embed vs Do Not Embed]

Also do not forget to check Library Search Paths or Framework Search Paths. I would recommend you to use drag-and-drop^[About]

[Step-by-step examples here]