The most recent version is Xcode 11, but this will only run on macOS Mojave 10.14.4 or later. This link will list several versions of xCode available for download. If you do not have one, you can register one for free.). Xcode Download and Setupĭownload Xcode from the App Store here (Note: Y ou will need to have a developer account with Apple. Here, we will be walking through setting up and running an iOS simulator on a Mac using Xcode and Expo. I recently created my first React Native app, an implementation of Snake, and found some conflicting information on how to set up a simulation. To test the code, Expo, an open source platform for Javascript and React, can be used to test your code by downloading the Expo app onto your iOS or Android device.īut what if you didn’t want to change machines every time you wanted to check on changes to your code? You can run a device simulator on your machine. Unlike Swift or Java, apps written in React Native can be used on both Android and iOS devices, eliminating the need to re-write code for multiple devices. React Native is a framework based on React made for front-end mobile development. Note: This blog assumes you are running on a Apple desktop/laptop with macOS Īfter the action is finished, your simulator should be working again.Creating Apps in React Native with an iOS Simulator Creating iPhone 6s for iOS version iOS 15.4 Creating iPhone 6s Plus for iOS version iOS 15.4 Creating iPhone SE (1st generation ) for iOS version iOS 15.4 Creating iPhone 7 for iOS version iOS 15.4 Creating iPhone 7 Plus for iOS version iOS 15.4. : Deleting iPhone 6s : Deleting iPhone 6s Plus : Deleting iPhone SE (1st generation ) : Deleting iPhone 7 : Deleting iPhone 7 Plus. Then, you will see deleting and creating logs-something like this. Are you sure ? All your simulators will be DELETED and new ones will be created ! ( You can use ` SNAPSHOT_FORCE_DELETE` to skip this confirmation ) (y /n ) The only thing you need to do is install Fastlane and run the following command. It sounds scary, but Fastlane has an action named reset_simulators that do all the hard lifting for you. Solutionįor me, the solution for this error is to nuke all the simulators and recreate them. I find many solutions out there, but I will share the one that works for me. There might be several reasons that cause this error. In my case, I can't even run a simulator alone without an Xcode. Today, while I was trying to run an iOS project, an iOS simulator failed to launch with the following error.

Macos iphone simulator