Xcode not responding

Should try to relaod and reinstall.

Have you enough memory, enough disk space available ?

Same thing happened to me! I tried to re-install but not solve the problem.

+ Enough memory - enough disk space.

Do you open an existing project ?

Does it occur with a new project as well ?

Did anyone find a solution to this?

Been having the same problem for a few weeks now and have tried all kinds of solutions posted in Stackoverlfow and this forum but nothing seems to solve the problem. Xcode just locks up, I have no spikes in CPU (never seems to get over 30%) nor in memory. Also I notice that somehow it is infecting other applications, have observed Safari, mail and Notes locking up in "sympathy".

This is extremely anoying... anyone have a solution?

Please, I'm having this same problem with my Xcode 10 version. Started with Xcode 9.3 and now updated to Xcode 10 and the problem persists. it's very frustrating. I'm having 405.73 Gb memory on my Mac, about only 5% of my memory used. I uninstalled and reinstalled the Xcode many times but still the same problem. My mac is up to date and I'm on High Sierra latest version. I went to the app store to check if there are any compatibility requirements my mac isn't satisfying but couldn't find any. please if you've been able to solve this problem kindly explain how. And the apple company should do something about it. Thanks!

Please, I'm having this same problem with my Xcode 10 version. Started with Xcode 9.3 and now updated to Xcode 10 and the problem persists. it's very frustrating. I'm having 405.73 Gb memory on my Mac, about only 5% of my memory used. I uninstalled and reinstalled the Xcode many times but still the same problem. My mac is up to date and I'm on High Sierra latest version. I went to the app store to check if there are any compatibility requirements my mac isn't satisfying but couldn't find any. please if you've been able to solve this problem kindly explain how. And the apple company should do something about it. Thanks!

I have the same problem with Xcode 10.1 and I use macOS Mojave.

I'm having 250 Gb memory on my Mac, about only 166 GB of my memory is available. I uninstalled and reinstalled the Xcode many times but still the same problem.

please if you've been able to solve this problem kindly explain how. And the apple company should do something about it. Thanks!

I started to use Xcode from version 8 about two years ago, and never have such a problem until two days ago, which began to slow down when I compile my project and suddenly got worth, now it stalls! So I searched the web and uninstalled and installed it, and the problem not fixed, I reinstalled Mojave, and still the same thing. My problem is with compile time, on design and coding it works fine, but when I compile, it slows down and not dies!

Does anyone in Apple even care about this?!!!

MacBook Pro (Late 2013)

Display: 15-Inches (2880 x 1800)

Display 2: LG 24UD58 - 24-inch (3840 x 2160)

CPU: 2.6 GHz Intel Core i7

HDD: 512 SSD (158.12 GB Free Space)

RAM: 16 GB 1600 MHz DDR3

OS: Mojave 10.14.3

Graphics: NVIDIA GeForce GT 750M 2048 MB

Intel Iris Pro 1536 MB

I have the same problem with Xcode in the last 30 minites the Activity monitor has recorded over 30 'Recent Hangs' making a total of over 73 for the day, I have been working for only about 3 hours using Xcode amd most of the time is spent waiting for Xcode to launch my app,

The app I am developing just has a single view controller and displayes some text,

Xcode version is Version 10.1(106B1)

I have never had a problem with Xcode in many years,but lately it has been terrible when "launching" apps to the Simulator

Similar trouble here. Existing iOS apps, existing Xcode install 10.2.1 existing Macbook Pro. No obvious changes, yet Xcode regular shows spinning rainbow wheel, "Not Responding" in activity monitor and Force Quit dialog. I can force quit and restart to get a few seconds or minutes of work done, or wait (again a few seconds or minutes....) seems no rhyme nor reason to the freezing - just painfully slow going at trying to get work done ;-(
I hope someone figures out the problem and helps us out.

Have you checked how much RAM available ?

Thanks for helping troubleshoot, Claude31! I have 16GB with just over 11GB used when the issue happens. Also 1TB storage with about half used. I don't think it's a resource problem. Any other ideas?

Not sure if it helps anyone else this issue, but the problem seems worse (or perhaps limited to) times that I'm running an iOS + watchKit extention app on an iPhone + Apple Watch. I've tried removing/adding the devices (iPhone + watch) and only using wired connection (iPhone only, of course) but the freeze still happens.
Anyone else having this issue notice it connected to Apple Wach being in the equation?

Did someone solved this issue? I found out that it may be related with storyboard with many view controllers. When I do a build and run the Mac got stalled and I must force restart it. If decrease the number of view controllers in the storyboard the issue disappears. I have a powerful MacBook Pro 15 mid 2014 that is very fast with all the programs I run. What’s the problem here?

I have same problem. Restarting Xcode constantly. I think its related to Apple Watch development. I dont have this problem with my iOS only projects as soon as I start working on WatchOS project, Xcode hangs every 5-10 minutes and it has many problems as in almost impossible to connect with my Apple Watch.