How to Run App in Simulator: Xcode Beta 6 iOS 8

Unable to run app in Simulator: Xcode beta 6 iOS 8

I solved it following these steps:

1. Open Xcode 6 beta
2. Go to the menu Xcode > Open Developer Tool > iOS Simulator
3. Even if an error dialog shows up, you still would have access to the iOS Simulator's menu
4. Select Hardware > Device > Manage Devices
5. Click on the little + sign at the bottom
6. Add (if missing) all the devices that you want, or delete and recreate the ones malfunctioning.
7. If anyone of the simulator is not working then right click on it and delete it and then re-create it again

Xcode 6 Beta iOS 8 Simulator can't access internet

I saw a lot of posts about re-starting the simulator, resetting the simulator settings, etc. I ended up re-installing X-Code, updating to X-Code 6.1, etc, etc. Still didn't have a connection to the network!

What ended up being the solution is I turned off my antivirus (TrendMicro). I had checked all the anti-virus settings before and didn't see any "block process connection". When I turned the whole thing off it solved the problem though.

Using Xcode 6 on 10.9 no iOS 8.0 simulator available

I had the same problem after restoring from Time Machine on a new MacBook Pro and found the solution from Abel Pascual in the Developer Forums:

1. Open Xcode 6 beta
2. Go to the menu Xcode > Open Developer Tool > iOS Simulator
3. Even if an error dialog shows up, you still would have access to the iOS Simulator's menu
4. Select Hardware > Device > Manage Devices
5. Add (if missing) all the devices that you want, or delete and recreate the ones malfunctioning.

(You can check the devices at ~/Library/Developer/CoreSimulator/Devices).

How can I run the iOS 7.1 Simulator in Xcode 6.0 Beta?

Finally I found it

Goto Hardware -> Device -> Manage Devices (In Simulator Menu)

or

window -> Devices (In Xcode Menu)

From there you can set the ios version and can add new sim from there.

Slow app performance under iOS 8 simulator with Xcode 6

Performance in the iOS Simulator is not expected to match performance on device. The iOS Simulator is meant as a tool for rapid prototyping and fast iteration. Performance tuning needs to be done on real devices.

Processes running in the iOS Simulator are basically OS X processes running in a specially crafted runtime within a special bootstrap to behave like iOS rather than OS X. Over the past 4 years, this has evolved from basically UIKit and similar iOS Frameworks built on top of OS X Frameworks to now having our own bootstrap server (as of iOS 7), our own dyld (as of iOS 8), and only sharing the host kernel and very low level system libraries (libSystem as of iOS 7, and just the pthreads, syscalls, and platform children of libSystem as of iOS 8).

When you test an app on a device that is not currently booted, we shutdown the device and boot the new one, and that process can take 10s to a minute or 2 to complete based primarily on your disk's I/O bandwidth and what other tasks on your system are demanding of it.

If you see major performance issues with a sim device that has been booted for a while and don't have any obvious background tasks running (compilation, rsync, whatever), take a sysdiagnose and take a look at the simulator processes in the spin dump and fs_usage to see what's likely going on.

Error opening iOS Simulator with iOS 8 beta version: Unable to boot the iOS Simulator

After I found some solutions on the web, a combination of procedures worked for me:

1. Close Xcode and iOS Simulator (and all related applications)

2. Install (or reinstall) Xcode6-Beta to Applications folder (direct from the .dmg file)

3. Open Xcode6-Beta and go to Xcode -> Preferences -> Locations -> Command Line Tools and select "Xcode 6.0" (be sure that you've selected the one in Applications folder)

4. Launch the iOS Simulator and go to iOS Simulator -> Reset Content and Settings...

5. Close all the applications and restart your mac (I unchecked "Reopen windows...")

6. Open Xcode6-beta and test the iOS Simulator

Good luck

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