I have recently been trying to use the newest version of Xcode (10.0), but when I go to open the simulator I get the error saying
"simulator unable to boot"
I have tried downloading previous versions but I still get the same error.
Asked
Active
Viewed 7,979 times
6
Jayprakash Dubey
- 35,723
- 18
- 170
- 177
Liam Ramsbottom
- 157
- 3
- 15
-
3Delete all simulators. – matt Oct 12 '18 at 11:06
-
Please specify if it's iOS simulator or tvOS simulator. – Cœur Oct 22 '18 at 02:22
-
Deletion of iphone and watchOS simulators works perfectly. – Nirav Jain Nov 25 '19 at 18:35
-
From about the mac -> storage -> manage -> Developer -> delete xcode caches and project build indexes and then try. Works for me – HackersInside May 17 '22 at 02:52
1 Answers
12
Your simulators might be stuck in some loop, try running this in bash:
The following lines delete all simulators
xcrun simctl shutdown all
xcrun simctl delete $(xcrun simctl list | grep -o '[0-9A-F]\{8\}-[0-9A-F]\{4\}-[0-9A-F]\{4\}-[0-9A-F]\{4\}-[0-9A-F]\{12\}' | xargs)
xcrun simctl delete unavailable
Then you can install all the devices via xcrun simctl again or via xcode. Simply run this code in bash line by line once again:
# This takes latest runtime available in xcode build. (IT counts with beta...)
runtime=$(xcrun simctl list runtimes | grep "iOS" | tail -1 | awk -F' - ' '{print $3F}')
# Simulators should carry the iOS version. And probably CI Prefix.
# Check if simulators alreadz exists.
echo "The current iOS runtime is: $runtime"
xcrun simctl create "iPhone 7" com.apple.CoreSimulator.SimDeviceType.iPhone-7 $runtime
Dominik Bucher
- 2,120
- 2
- 16
- 25
-
I'm sure there are non command-line solutions: the OP didn't even specified if it was iOS or not, or if he tried classic steps from previous questions on the matter. – Cœur Oct 22 '18 at 02:28
-
I am sure there are not :D because you simply cannot shutdown simulators stuck in memory... You could use Activity monitor to shutdown CoreSimulator proceses, but you need to be careful not to kill some which cannot be rebooted until reboot of computer... – Dominik Bucher Oct 22 '18 at 05:26
-
I mean: this question about _"simulator unable to boot"_ is a duplicate of [Unable to run app in Simulator: Xcode beta 6 iOS 8](https://stackoverflow.com/questions/24033417/unable-to-run-app-in-simulator-xcode-beta-6-ios-8) which has already 28 answers, and none of them is using `xcrun`. – Cœur Oct 22 '18 at 05:33
-
-
2Perfect answer for this fix is https://stackoverflow.com/a/48075384/4439983 – Noor Mar 26 '19 at 08:01
-
1