I have been building mac app on my mac mini and it always worked well but today i faced this error, searched a lot but no luck.
Message from debugger: unable to attach
What i tried:
Clear derived data
Quit Xcode
Restart machine
installation directory set to blank and also to /Applications
Tried Skip Install No / Yes
Using developer Signing certs
M using only Developer certificates and not provisioning profile to sign my cocoa app
Xcode 8.2
OSX 10.12.1
Please help :)
This is what fixed it for me, perhaps it will help others but I do realize the question was for 8.2. I had it set to Xcode 9 "New Build System" disabling this and switching to "Standard Build System" in the Project Settings under the File Menu. I had tried all the other things like killing DerivedData, clean build, restarting Xcode. I also verified that my dependent libraries were set correctly. The only thing that worked was disabling new "New Build System"
I just had this problem today. I have little demo code in a mac project(created with Xcode 9.4). This error just started to occur after I upgraded system to macOS Mojave 10.14. However, in Xcode 10 this project runs no problem(without changing anything). If you can use Xcode 10 it will probably be fixed.
Unfortunately, the above solutions didn't work for me (although I am sure they work for some people).
Here is what worked for me, in case this helps anyone else:
Close Xcode
Open Xcode and Create a new Xcode project
In the iOS template, select Single View App then click Next
yes, I know you are trying to get a macOS app attaching to the debugger :).
Give the iOS app any product name and organization identifier you would like and click Next
Create the new project anywhere you would like (I saved it to my desktop)
Build and run (cmd + r) the iOS app on a simulator like the iPhone 8 (starting a simulator and running the iOS app will take a little time, so have patients)
After the iOS app runs in the simulator, click to stop it from running (the stop button is next to the run button)
Open your macOS app that you are having trouble connecting a debugger to, and build and run it (cmd + r)
This, for some reason, allowed me to connect to the debugger with my macOS app...
Xcode version: 10.1, macOS Mojave version: 10.14.2
While running my app on iPhone, I needed to view the database contents. So I selected Devices in Xcode and chose my device. Thereafter, i selected my app and clicked on the Settings button which shows 3 options: Show container, Download container and Remove container. On clicking the Download container option, I was asked where I want to store the container. After selecting the location, I am getting the following error: An error occured while attempting to download the container from application "MyApp".....
On selecting Show container option, a list opens up but there is no file inside it.
The same problem occurs with other apps too that I run using Xcode.
Any ideas as to why this happens and how to fix it?
I just rebooted my iPhone. That seems to fix it! Really weird, but works.
I have been having the issue every now and then especially after the phone has been connected to Mac and Xcode for about an hour.
Sometimes, just rebooting the phone isn't good enough, you'll also have to quit Xcode and start again after rebooting the phone!
I also had this problem yesterday, and the solution was a mismatched version of iOS 10 and Xcode 7. After I did the App Store upgrade to Xcode 8, I was able to download successfully.
In my case the issue was due to the fact that the version installed was a release version.
After installing the "Debug" version, the download worked fine.
I'm developing a background only OS X app in Xcode. I've archived the app and placed .app file in /Library/Input Methods/. It's running fine. Yesterday, every time I modified something & then run it in Xcode, newly built app would run instead of the one I placed in /Library/Input Methods/ and I could see the Console output of the newly built app.
But suddenly today this doesn't happen. The one in /Library/Input Methods/ runs and nothing is shown in console. Also when I run the app in Xcode, I can see two instances of the app in Activity Monitor (one from /Library/Input Methods/ and other one from Xcode).
I'm using Xcode 5.1 and OS X 10.9
I tried quiting-restarting Xcode, restarting Mac, cleaning project, deleting data in Derived Data folder etc. But nothing worked. Any help would be highly appreciated. Thanks in advance.
Figured it out. I had to run the app from Xcode BEFORE it gets started from the system i.e. by changing input method. So the app process of Xcode build needs to be run first.
Using Xcode 5 GM, anytime I switch to the 5.1, 6.0 or 6.1 simulators to test, I get the error "iOS Simulator failed to install application." When I reset the simulator it works, but this is getting very tiring.
Anybody have a permanent fix or workaround?
Looks like this is a known issue. From the Xcode 5 release notes:
After switching the minimum deployment target of an application from
iOS 7.0 to a release prior to iOS 7.0, building and running the
application may fail with the message “iOS Simulator failed to install
the application.”
Go to the iOS home screen, click and hold the application icon, then tap the hovering “X” button to delete the application. 13917023
Another release note:
iOS Simulator
If an iOS app is detached, relaunching the same app from Xcode will
result in a black screen in the Simulator even though the new app is
launched. Terminate the app in the Simulator or relaunch it for the
second time. 14648784
Delete the old version app in your simulator (usually iOS 6.x).
Alternatively, header over to iOS Simulator - Reset Content and Settings.
This can be easier when you have a lot of apps on the simulator and can't remember which one you're currently working on.
You need to do this for every iOS Simulator version that causes the problem.
None of the other suggestions worked for me. However, after comparing my existing app settings to a new vanilla project, I noticed that the "Build" field for my Target was blank. Once I put something in that field, the app installed just fine!
if you have already developed project and you used xib to develop views then
X-Code > Inspector Selector Bar > Interface Builder Document > opens in > and change from Xcode Default(5.o) to Xcode 4.6 .
Build and Run your app it will run successfully, if it won't run again then, header over to iOS Simulator - Reset Content and Settings. delete old app from simulator then Run again.
i got the same problem but solved by following way....
Launch the iOS Simulator
Go and click "iOS Simulator" menu
Click "Reset content and settings"
Close simulator and rebuild your app.
Above screen shot is showing the way how you can do this...
I think this works for you...!!!
Deleting the app in the simulator works for me.
just wanted to add that this happen only if I open xib that created in xcode 4.6
If it's other files, this not happen
try this ....
in my case nothing have worked for me , after resetting the content simulator also , i am not able to install the app on simulator . after that i just changed my project location . i just moved the project to other location . then it installed successfully.
None of the above things worked for me. I just reinstalled xcode and it worked.
Ran into this issue today. Found it was an empty Reference Folder (blue folder) causing this. Removed the folder from Resources in Build Phase... cleaned build folder for the heck of it, and it went away.
/Users/YOURUSERNAME/Library/Developer/Xcode/ --> remove all contents of this folder, then simply launch the app from Xcode.
To check your Executable file settng ex.$(EXECUTABLE_NAME)
(Project setting - info property page)
I have different issue when getting error message “iOS Simulator failed to install application”, the reason is because I have added a property in App-Info.plist without any value. For instance, [Application Category] with no value. Thus the error will show up as well.
When I got this error, the image of the phone actually appeared, but the image of the app I wanted to test did not. Instead, I was on the main page of the phone that shows the apps you have. I fixed this problem by deleting the many icons that appeared on the start screens - about 30 of them. These had been created when I testing apps over the months. So, not saying its a solution, but it started working after I deleted the old app images.
For me it was -framework XCTest.
It made the app die with iOS Simulator failed to install application
and on the device Could not inspect the application package.
Removed it and now works.
You are using Xcode GM which is under beta stage. Use latest Xcode 5.1.1 available.
Also, these error occur while switching between simulator (32 bit and 64 bit).
Quit the simulator and re-build the application. OR
Reset simulator from "iOS simulator" -> "Reset content and settings.."
I changed my app name and bundle id midway. I happened to delete the Executable File name in my plist. I changed it back to "${EXECUTABLE_NAME}" (no quotes) and I'm back in business.
I can't debug any application on my iPhone. XCode compiles the application, deploys it to iPhone, says it is running the app, and immediately I see the message "Finished running x.app on iDevice". Although the app crashes, it is copied to the phone. After this crash I can start the application on the phone without problems but can't seem to debug any project on the phone. No old projects, no new projects, everything seems to be broken.
There are lots of advices to solve this problem on SO but none of them helped me a bit.
I use XCode 4.6 on Mac OSX 10.8.2.
had the same problem when i changed the project name and the app name.
i've done several times reset to the simulator 'ios simulator' --> 'reset....'.
try it, also try to delete old app in device and simulator, do 'product' --> 'clean', and then try again.
it sounds silly but its working for me when i has the same issue.
Try changing the Version number in 'deployment target' in your App's target in XCode to something else.
Does it run in your Simulator?
Try running in some other device (some other device version,like 4S or 4)
Is the issue with iPad or iPhone or both?