# Circle CI failing build when running code specific to ios 13

**URL:** <https://discuss.circleci.com/t/circle-ci-failing-build-when-running-code-specific-to-ios-13/32812>\
**Category:** Mobile\
**Tags:** ios\
**Created:** [October 7, 2019, 12:24pm UTC](https://discuss.circleci.com/t/circle-ci-failing-build-when-running-code-specific-to-ios-13/32812 "2019-10-07T12:24:14Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![sindhu238](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/sindhu238/32/23349_2.png) [@sindhu238](https://discuss.circleci.com/u/sindhu238)\
**Post date:** [October 7, 2019, 12:24pm UTC](https://discuss.circleci.com/t/circle-ci-failing-build-when-running-code-specific-to-ios-13/32812/1 "2019-10-07T12:24:15Z")

</div>

After the ios 13 update, I added some code specific to ios13. Then i got this error:  
Use of unresolved identifier ‘UINavigationBarAppearance’; did you mean ‘UINavigationBarDelegate’?

**UINavigationBarAppearance** - Added in ios13

So I changed my circle ci config.yml file:

mac\_exec:  
macos:  
xcode: “ **11.0.0** ”

But since then I am getting this error:

```
#!/bin/bash --login -o pipefail echo 'export BUNDLER_VERSION=$(cat Gemfile.lock | tail -1 | tr -d " ")' 
>> $BASH_ENV source $BASH_ENV sudo gem install bundler

Fetching bundler-2.0.2.gem bundler's executable "bundle" conflicts with /Users/distiller/.rubies/ruby- 
2.6.3/bin/bundle Overwrite the executable? [yN]
```

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<div class="post-metadata">

**Author:** ![marc](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/marc/32/835_2.png) [@marc](https://discuss.circleci.com/u/marc)\
**Post date:** [October 7, 2019, 1:28pm UTC](https://discuss.circleci.com/t/circle-ci-failing-build-when-running-code-specific-to-ios-13/32812/2 "2019-10-07T13:28:17Z")

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> [@sindhu238](#):
>
> gem install bundler

`bundler` is already present in the image, and on the path, so you should not need to install it.

If you do need to, then you can run `gem install bundler` (no `sudo`) required.

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<div class="post-metadata">

**Author:** ![sindhu238](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/sindhu238/32/23349_2.png) [@sindhu238](https://discuss.circleci.com/u/sindhu238)\
**Post date:** [October 7, 2019, 2:07pm UTC](https://discuss.circleci.com/t/circle-ci-failing-build-when-running-code-specific-to-ios-13/32812/3 "2019-10-07T14:07:54Z")

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```
  configure-bundler:
      steps:
        - run:
            name: Configure Bundler
            before_install: gem update bundler
            command: |
              echo 'export BUNDLER_VERSION=$(cat Gemfile.lock | tail -1 | tr -d " ")' >> $BASH_ENV
              source $BASH_ENV
              sudo gem install bundler

```

In the about command, is just this line not needed:  
`sudo gem install bundler`

---

<div class="post-metadata">

**Author:** ![sindhu238](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/sindhu238/32/23349_2.png) [@sindhu238](https://discuss.circleci.com/u/sindhu238)\
**Post date:** [October 7, 2019, 3:31pm UTC](https://discuss.circleci.com/t/circle-ci-failing-build-when-running-code-specific-to-ios-13/32812/4 "2019-10-07T15:31:49Z")

</div>

I have removed  
`sudo gem install bundler`  
Now it is working fine. But after the unit tests have passes, this is what is happening:

`xcrun simctl spawn F01E46D3-4A64-4D7E-9D31-C397D5A0618C log collect --output /Users/distiller/project/output/xcode/system_logs-iPhone\ 8_iOS_13.0.logarchive 2>/dev/null`

`Exit status: 124`.

Any idea on what this is about?