[Troubleshooting] iOS Simulators are no longer available in Rider on Mac

iOS simulators disappearing might be related to several issues on their own. They might be:

•  Not listed at all;
•  Greyed out. 

Thus, it may be useful to try troubleshooting steps listed below first:

From Rider's Side

• Delete .idea folder

Find it in the Help > Diagnostic Tools > Special Files and Folders > PROJECT StorePath. Delete it in the physical path mentioned and restart Rider;

• Try EAP or nightly version

Download the EAP version using this link. EAP is usually packed with all sorts of different improvements. Hence, it might hit a known issue. 

To get a nightly build, follow the steps below:

1. Download and install the JetBrains Toolbox app.
2. Find JetBrains Rider in the list of products, click the dots on the right and select Other versions
3. Locate a build labeled Nightly and click Install

From Rider and Xcode

• Check if the correct Xcode version is selected in Rider

Go to Rider > Settings > Settings | Build, Execution, Deployment > Apple Platforms > Xcode path. Make sure this path is the same with the Xcode > Settings > Locations > Command Line Tools. If it differs, change one of them to the proper one. 

From macOS or Xcode side

• Update Xcode

Make sure that the Xcode is up to date in Applications.

• Try another Xcode version

Use instructions from this StackOverFlow thread or some third-party apps like Xcodes.

• Make sure required Simulators are downloaded

Use the Xcode documentation to add simulators if required. 

• iOS platform is installed

Make sure that not only Simulators are installed in Xcode > Settings > Components, but iOS platform as well: 

• Re-install the iOS Platform;

Go to Xcode > Settings > Components > press on the i sign right to the iOS platform > Delete. 

Once the platform is deleted, press the Get button in the lower right corner of the same menu and choose the iOS platform to install. 

You may also reinstall the Xcode itself using these instructions.

If nothing of the above steps helps or the previous version works only, please contact Support (Help > Contact Support) so we can investigate it further.