Are you an IOS developer, and a newbie developer who is not much experienced in IOS development. You downloaded a code from internet for your reference. When you opened it you found that there are no simulators list to run your code against but showing My Mac 64-bit, as shown in picture below
This article or post will help you in resolving the above listed thing and bring back simulators list. Follow some steps and it will get solved
Step 1: Select your project and in its target general settings check for deployment target, if its not there then set it.
|Xcode Project Target Setting|
Step 2: If you still did not found simulators list, then select app target next to stop button and select edit scheme. Shown in picture below
|Select edit scheme|
Step 3: When you press edit scheme a window will pop up, select Run as shown in picture
In above picture you can clearly see that there is no executable selected for the project, its NONE in front of RUN.
Step 4: Select Executable drop-down and select your app target there. Shown in picture
|Select target from Executable Drop Down|
Now you have list of simulators to run the app.
|Complete demo as slideshow|