# Manual download

&gt;The always working and preferred workaround!

Download directly from Apple:

- **[Latest Release version](https://developer.apple.com/download/release/)** or
- **[Latest Beta version](https://developer.apple.com/download/)** or
- **[Any version you need](https://developer.apple.com/download/more/)** and all other downloadable contents

Then extract and move it where you like. This has so many benefits comparing to AppStore updates. (like the ability to resume download, not replacing the old one, not wasting hidden directories and etc.)

**Note that** you should use safari to download it.

---
# Force App Store to re-download.

Apple suggested this workaround but many developers (including me)prefer manual download to save a lot of network traffic!

Since This is [Known Issues](https://developer.apple.com/documentation/xcode_release_notes/xcode_11_1_release_notes#3400988)
&gt; Xcode may fail to update from the Mac App Store after updating to macOS Catalina. (56061273)

Apple suggest this:

&gt; To trigger a new download you can delete the existing `Xcode.app` or temporarily change the file extension so it is no longer visible to the App Store.

I&#39;m reading [the code of Guava][1] where I found the annotation `java.util.@Nullable` in some code. I know the meaning of `@Nullable`, but I don&#39;t understand this one. In particular, I can&#39;t find a class called `Nullable` in the package `java.util`.
Please, someone tell me what&#39;s the meaning of this `java.util.@Nullable`:

```java
public static &lt;T&gt; java.util.@Nullable Optional&lt;T&gt; toJavaUtil(
    @Nullable Optional&lt;T&gt; googleOptional) {
  return googleOptional == null ? null : googleOptional.toJavaUtil();
}
```


  [1]: https://github.com/google/guava/blob/491fe70163262b0da469da4fa7856a0aa5b9ce09/guava/src/com/google/common/base/Optional.java#L141-L144

What&#39;s the meaning of java.util.@Nullable?

When running `yarn add --dev jest`, I got *error Incorrect integrity when fetching from the cache*.

Full output:
----------


```bash
tests (master)$ yarn add --dev jest
yarn add v1.19.0
info No lockfile found.
[1/4] Resolving packages...
warning jest &gt; jest-cli &gt; jest-config &gt; jest-environment-jsdom &gt; jsdom &gt; left-pad@1.3.0: use String.prototype.padStart()
[2/4] Fetching packages...
error Incorrect integrity when fetching from the cache
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
```

I tried removed `node_modules`, re-ran `yarn install` and `yarn add --dev jest` to no avail.

How do I fix this?

Incorrect integrity when fetching from the cache

Trying to update from Xcode 11 GM to 11.1 always fail.

I tried moving /Applications/Xcode.app first... nothing works

This is my commerce log:

&gt;2019-10-08 12:29:08+01 leviathan installd[556]: PackageKit: Install Failed: Error Domain=PKInstallErrorDomain Code=501 &quot;The package is attempting to install content to the system volume.&quot; UserInfo={NSLocalizedDescription=The package is attempting to install content to the system volume.} {

Can&#39;t update Xcode 11

Trying to update from Xcode 11 GM to 11.1 always fail.
I tried moving /Applications/Xcode.app first... nothing works
This is my commerce log:
>2019-10-08 12:29:08+01 leviathan installd[556]: PackageKit: Install Failed: Error Domain=PKInstallErrorDomain Code=501 "The package is attempting to install content to the system volume." UserInfo={NSLocalizedDescription=The package is attempting to install content to the system volume.} {

I have an existing App, basically a shopping list app, to which I&#39;m trying to add some sweet sweet SwiftUI lovin.

My issue is the real time preview updating doesn&#39;t work - the warning &quot;Automatic preview updating paused&quot; continually shows. I hit the resume button, it builds the app, it shows the current view, and that warning immediately shows again. I can never see changes to the code reflected in the canvas without using the resume button.

This is happening in Xcode 11.1, and 11.2 beta 2. I can find literally no other mention of this either here on SO, and there&#39;s one thread with no answers on Apple&#39;s Dev forums.

SwiftUI: Automatic preview updating paused, always

After an automatic update of [macOS v10.15][1] (Catalina), I am unable to open Xcode. Xcode prompts me to install additional components but the installation fails because of MobileDevice.pkg (Applications/Xcode.app/Contents/Resources/Packages)

I have found multiple answers on how to locate MobileDevice.pkg and that I should try to install it directly, but when I try to do this the installation fails too. I have also tried updating Xcode from [App Store][2], but the update failed when it was nearly finished.

Has anyone experienced the same behaviour? Should I reset the Mac to default and install [macOS v10.13][3] (High Sierra) or Catalina from scratch or it is a problem of Xcode and re-install would do the job?

I have found a discussion [here][4] that was posted today and is probably regarding the same issue and it seems like many people are dealing with it, too.

&lt;!-- language-all: lang-python --&gt; 

The log:

    *2019-10-25 01:03:34+02 Vendula-MacBook-Pro Xcode[1567]: Package: PKLeopardPackage 
    &lt;id=com.apple.pkg.MobileDevice, version=4.0.0.0.1.1567124787, url=file:///Applications/Xcode.app/Contents/Resources/Packages/MobileDevice.pkg&gt; 
    Failed to verify with error: Error Domain=PKInstallErrorDomain Code=102 
    &quot;The package “MobileDevice.pkg” is untrusted.&quot; 
    UserInfo={
      NSLocalizedDescription=The package “MobileDevice.pkg” is untrusted., 
      NSURL=MobileDevice.pkg -- file:///Applications/Xcode.app/Contents/Resources/Packages/, 
      PKInstallPackageIdentifier=com.apple.pkg.MobileDevice, 
      NSUnderlyingError=0x7fabf6626d00 
      {
        Error Domain=NSOSStatusErrorDomain 
        Code=-2147409654 &quot;CSSMERR_TP_CERT_EXPIRED&quot; 
        UserInfo={
          SecTrustResult=5, 
          PKTrustLevel=PKTrustLevelExpiredCertificate,   
          NSLocalizedFailureReason=CSSMERR_TP_CERT_EXPIRED
        }
      }
    }*

  [1]: https://en.wikipedia.org/wiki/MacOS_Catalina
  [2]: https://en.wikipedia.org/wiki/App_Store_(macOS)
  [3]: https://en.wikipedia.org/wiki/MacOS_High_Sierra
  [4]: https://discussions.apple.com/thread/250782804


MobileDevice.pkg untrusted, cannot open Xcode after OS X update

We&#39;re using React Native `0.59.10` and React-Redux `5.0.7`, and are experiencing a CPU-bound performance issue, in which our Redux actions are taking ~0.25s to complete.

We&#39;ve profiled using the Time Profiler configuration in Instruments, but none of our JS code is symbolicated.

Remotely debugging in Chrome seems to just debug the &quot;remote inspector&quot; page, which is entirely unhelpful.

Is there a way to build/attach a source map, or symbolicate the memory addresses seen below, to the JS function names/calls?

[![Instruments Callstack][1]][1]


  [1]: https://i.stack.imgur.com/HW82V.png

How to profile React Native source code using Xcode/Instruments/Time Profiler

I have a framework (in this instance it&#39;s RxSwift) which I&#39;ve compiled using Xcode 11.0 into the traditional `RxSwift.framework` style package

This imported fine into Xcode 11.0 and also 11.1 never had any problems with it

Today, upon Apple&#39;s release of Xcode 11.2, I upgraded, and I am presented with the error:

**Module compiled with Swift 5.1 cannot be imported by the Swift 5.1.2 compiler**

I&#39;m used to swift compiler mismatches, and I&#39;m aware I can just recompile RxSwift using Xcode 11.2 and carry on, but the headline feature of Swift 5.1 was **module stability**.

I was under the impression that now that we have module stability, frameworks won&#39;t need to keep getting recompiled with every new Xcode release, yet this is clearly not the case.

If anyone can explain what is going on here I would much appreciate it. Is Xcode 11.2 exhibiting a bug? or did I somehow need to tell it I wanted module stability when I originally compiled with Xcode 11.0?

Module compiled with Swift 5.1 cannot be imported by the Swift 5.1.2 compiler

After upgrading to Xcode 11.2 from Xcode 11.1 my app crashes:
&gt;*** Terminating app due to uncaught exception &#39;NSInvalidUnarchiveOperationException&#39;, reason: &#39;Could not instantiate class named _UITextLayoutView because no class named _UITextLayoutView was found; the class needs to be defined in source code or linked in from a library (ensure the class is part of the correct target)&#39;

Why is this happening? How can I prevent this crash?

After upgrading to Xcode 11.2 from Xcode 11.1, app crashes due to _UITextLayoutView

I used to use autolayout add new constraints to make simple constraints to superview / relative view like this (for loooong time): 

[![enter image description here][1]][1]

However, recently after updated to the latest xcode (11.3.3 or just 11.3/11C29), I have this weird issue: when I set the constant = 0, they always generate the constraints in an unwanted way like this: 

[![enter image description here][2]][2]

And it seems default value is somehow 20 and making my view look so wrong (0 compared to 20?)

If I fix that by edit the constraint like this:

[![enter image description here][3]][3]

Then it&#39;ll correct again (the image is after edited the constraints, before edited it display constant = `Standard`)

I don&#39;t even know how to describe the issue, but how do I fix this new `add new constraint` to use my desire point instead of standard / default?

Update:

It seems to only happened when constraint to superview. No clue how to fix tho.

Update Apr-01-2020:

Xcode11.4 fixed this.


  [1]: https://i.stack.imgur.com/H66p8.png
  [2]: https://i.stack.imgur.com/QGLh6.png
  [3]: https://i.stack.imgur.com/ajIsr.png

Xcode 11 add new constraints set zero: use set value instead of default / standard

When inspecting a crash with Firebase Crashlytics, I noticed the following line in the Keys section:

&gt; CoreUI: deallocating _CUIInternalLinkRendition 7113 /private/var/containers/Bundle/Application/1E06D0B4-30EA-41CA-998C-D8E86AA94100/&lt;appname&gt;.app/Assets.car

Is this related to the assets in my app? A memory issue in CoreUI?

crash_info_entry_0: CoreUI: deallocating _CUIInternalLinkRendition ... Assets.car

I was using the latest version of `Android Studio IDE` for creating `flutter` apps. But when I upgraded from Mojave to Catalina and tried to open my `flutter` code on IDE it gave me an error saying: 

&gt; Dart can not be opened because the Developer can not be verified

What is the reason behind the error and how can I solve the issue?

Do I have to install flutter and relative development tools from scratch again or is there any other way to resolve the issue?



[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/xhHGY.png

Flutter App Running Error: Dart can not be opened, Developer can not be verified after upgrading to Catalina

I have downloaded Visual Studio Code for the first time but I keep getting message below:

![apple error message when clicking on VSC app][1]

  [1]: https://i.stack.imgur.com/JYhkw.png

 &gt; &quot;Visual Studio Code&quot; can&#39;t be opened because Apple cannot check it for malicious software. 
 &gt;
 &gt; This software needs to be updated. Contact the developer for more information.

My MacBook is up to date, and I even updated the latest version of VSC on their website (September 2019 (version 1.39); there is none for October) but it still gave me the same message.

Looking into their FAQ, I read about reinstalling VS Code. I did that but it still doesn&#39;t work.

Visual Studio Code can&#39;t be opened because &quot;Apple cannot check it for malicious software&quot;

After upgrading to Catalina from Mojave, Setuping: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk in the env.

I&#39;m unable to compile a program that use `&lt;cmath&gt;` header.


I tried changing CFLAGS, CCFLAGS, CXXFLAGS to point to the MacOSSDK Location that change nothing

```
Scanning dependencies of target OgreMain
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f OgreMain/CMakeFiles/OgreMain.dir/build.make OgreMain/CMakeFiles/OgreMain.dir/build
[  0%] Building CXX object OgreMain/CMakeFiles/OgreMain.dir/src/OgreASTCCodec.cpp.o
cd /Users/roman/Downloads/ogre-1.12.2/build/OgreMain &amp;&amp; /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++  -DOgreMain_EXPORTS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0 -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OSX -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/include/Threading -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/src -I/Users/roman/Downloads/ogre-1.12.2/build/Dependencies/include -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/include -I/Users/roman/Downloads/ogre-1.12.2/build/include -I/Users/roman/Downloads/ogre-1.12.2/OgreMain -isystem /usr/local/include  -Wall -Winit-self -Wcast-qual -Wwrite-strings -Wextra -Wundef -Wmissing-declarations -Wno-unused-parameter -Wshadow -Wno-missing-field-initializers -Wno-long-long -Wno-inconsistent-missing-override  -msse -O3 -DNDEBUG -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -fPIC -fvisibility=hidden -fvisibility-inlines-hidden   -std=c++11 -o CMakeFiles/OgreMain.dir/src/OgreASTCCodec.cpp.o -c /Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OgreASTCCodec.cpp
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OgreASTCCodec.cpp:29:
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OgreStableHeaders.h:40:
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/include/OgrePrerequisites.h:309:
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/include/OgreStdHeaders.h:10:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:314:9: error: no member named &#39;signbit&#39; in the global namespace
using ::signbit;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:315:9: error: no member named &#39;fpclassify&#39; in the global namespace
using ::fpclassify;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:316:9: error: no member named &#39;isfinite&#39; in the global namespace; did you mean &#39;finite&#39;?
using ::isfinite;
```

for example the macro: `isless` is present in the global namespace and on my computer:

```
➜ cat math.h | grep &quot;isless&quot;

#define isless(x, y) __builtin_isless((x),(y))
#define islessequal(x, y) __builtin_islessequal((x),(y))
#define islessgreater(x, y) __builtin_islessgreater((x),(y))
➜  pwd
/usr/local/include
➜
```

Even the cmath header include it:

```
➜ cat /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath | grep &quot;math.h&quot;
#include &lt;math.h&gt;
```

And my command line have the option `-isystem /usr/local/include`

This should work...


Catalina C++: Using &lt;cmath&gt; headers yield error: no member named &#39;signbit&#39; in the global namespace

I have installed both Catalina and Xcode 11 from store and they are up to date:

 - Catalina: 10.15.1 (19B88)
 - Xcode: 11.2 (11B52)

Yesterday I have uploaded a new binary using `fastlane`. Today I got this message from Apple:

&gt; Dear Developer,
&gt; 
&gt; We identified one or more issues with a recent submission for App
&gt; Store review for your app, &quot;G&#246;zen Security&quot; 7.3.2 (67). Please correct
&gt; the following issues, then upload again.
&gt; 
&gt; ITMS-90534: Invalid Toolchain - Your app was built with an unsupported
&gt; version of Xcode or SDK. If you plan to submit this build to the App
&gt; Store, make sure you are using the GM version of Xcode 10.1 and the
&gt; SDK for iOS 12.1 and watchOS 5.1, Xcode 7.1 and the SDK for tvOS 9, or
&gt; Xcode 6 and the SDK for macOS 10.9 or later. If you are using an Xcode
&gt; beta version to test your app, make sure you are using the latest
&gt; supported version. For more information about supported beta versions,
&gt; view the App Store Connect What&#39;s New page
&gt; (https://developer.apple.com/app-store-connect/whats-new/).
&gt; 
&gt; Best regards,
&gt; 
&gt; The App Store Team

Since `Catalina` and `Xcode 11` are officially released why `Apple` still want me to use `Xcode 10` and `iOS 12`?

App archived with Xcode 11.2 (11B52) rejected: ITMS-90534: Invalid Toolchain

**EDIT: This has been fixed in iOS 13.3!**

Minimal reproducible example (Xcode 11.2 beta, this works in Xcode 11.1):

    struct Parent: View {
        var body: some View {
            NavigationView {
                Text(&quot;Hello World&quot;)
                    .navigationBarItems(
                        trailing: NavigationLink(destination: Child(), label: { Text(&quot;Next&quot;) })
                    )
            }
        }
    }

    struct Child: View {
        @Environment(\.presentationMode) var presentation
        var body: some View {
            Text(&quot;Hello, World!&quot;)
                .navigationBarItems(
                    leading: Button(
                        action: {
                            self.presentation.wrappedValue.dismiss()
                        },
                        label: { Text(&quot;Back&quot;) }
                    )
                )
        }
    }

    struct ContentView: View {
        var body: some View {
            Parent()
        }
    }

The issue seems to lie in placing my `NavigationLink` inside of a `navigationBarItems` modifier that&#39;s nested inside of a SwiftUI view whose root view is a `NavigationView`. The crash report indicates that I&#39;m trying to pop to a view controller that doesn&#39;t exist when I navigate forward to `Child` and then back to `Parent`.

    Terminating app due to uncaught exception &#39;NSInternalInconsistencyException&#39;, reason: &#39;Tried to pop to a view controller that doesn&#39;t exist.&#39;
    *** First throw call stack:

If I were to instead place that `NavigationLink` in the body of the view like the below, it works just fine.

    struct Parent: View {
        var body: some View {
            NavigationView {
                NavigationLink(destination: Child(), label: { Text(&quot;Next&quot;) })
            }
        }
    }

Is this a SwiftUI bug or expected behavior?

EDIT: I&#39;ve opened an issue with Apple in their feedback assistant with the ID `FB7423964` in case anyone out there from Apple cares to weigh in :).

EDIT: My open ticket in the feedback assistant indicates there are 10+ similar reported issues. They&#39;ve updated the resolution with `Resolution: Potential fix identified - For a future OS update`. Fingers crossed that the fix lands soon.



Content Type	Original Author	Original Content on Stackoverflow
Question	Mycroft Canner	View Question on Stackoverflow
Solution 1 - Xcode	Mojtaba Hosseini	View Answer on Stackoverflow

Can't update Xcode 11

Xcode Problem Overview

Xcode Solutions

Solution 1 - Xcode

Manual download

Force App Store to re-download.

Incorrect integrity when fetching from the cache

What's the meaning of java.util.@Nullable?

Attributions