This copy of libswiftCore.dylib requires an OS version prior to 12.2.0

Question

The app crashes on launch when running from XCode 10.2 (before and after Swift 5.0 migration) with this on console

This copy of libswiftCore.dylib requires an OS version prior to 12.2.0.

I understand the error, but not sure what is required to fix this.

You folks are using Buck as well, right? I'm wondering if it's the binary version of `xctest` that we are using. That's my current hypothesis. — Steven Hepting, Mar 27 '19 at 00:11

score 69 · Answer 1 · edited Aug 27 '19 at 09:17

69

Go to BuildSettings -> Linking -> runpath search path and add

/usr/lib/swift

as your 1st argument like this:

Image of dialog

edited Aug 27 '19 at 09:17

Druckles

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answered Aug 27 '19 at 07:47

A H

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I know that it is not allowed to say thank you here but I will write: THANK YOU! – Serdar D. Sep 21 '20 at 12:32

msk · Accepted Answer · 2020-04-26T06:56:18.540

46

Make sure /usr/lib/swift is the first argument for runtime search paths for linker if iOS >= 12.2, it should load platform libraries.

edited Apr 26 '20 at 06:56

answered Mar 28 '19 at 08:05

msk

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Did you have to patch Buck itself for that? – Steven Hepting Mar 28 '19 at 18:40
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We are not using Buck and still getting this error. I wonder if there is any generic solution for this.. – CrazyJoeLv Mar 29 '19 at 13:52
We have our own fork of BUCK, where we fixed, – msk Mar 29 '19 at 16:07
Is this similar to the path you used for Buck? https://gist.github.com/shepting/703b1eda5a4784dfd9ecb4879626bd1f – Steven Hepting Mar 29 '19 at 18:33
@StevenHepting yup – msk Mar 30 '19 at 21:46
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I've never even heard of BUCK, but this solution worked for me! Thanks, now I can finally proceed with profiling my app. – Toine Heuvelmans Nov 26 '19 at 12:26

score 31 · Answer 3 · answered Mar 29 '19 at 14:44

31

Got it fixed in our ObjectiveC-only project by adding empty Swift file. Don't remove it, just keep it there forever!

answered Mar 29 '19 at 14:44

CrazyJoeLv

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This is ugly but it works. Did not try adding the swift lib to the runtime search paths, which may have also fixed the issue, and would be more elegant, but its late in the day and im looking for quick wins at this stage. – Ryan Knell May 14 '19 at 06:06
Was having the same issue while integrating lottie in react native ios. This answer worked off the bat. – amar Aug 12 '19 at 05:05
Mine fixed too, I dont know why? – muyoungko Aug 14 '23 at 08:23

score 4 · Answer 4 · answered Apr 13 '19 at 18:46

4

For anybody not using BUCK but still experiencing this issue, try adding /usr/lib/swift in your target's Runtime Search Paths (under Build Settings). Instantly fixed things up for me.

answered Apr 13 '19 at 18:46

adamup

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score 0 · Answer 5 · answered Jun 27 '19 at 13:10

0

This worked for me:

Go to "Window" tab -> "Devices and Simulators"
Switch to "Simulators" tab
Click on "+" in bottom left corner
Select "iPhone X" (or whatever device you see in console error) in "Device Type" select
Click "Create"

answered Jun 27 '19 at 13:10

Demyd Ganenko

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score 0 · Answer 6 · answered Nov 26 '19 at 19:09

0

Check that the version of iOS Deployment Target in Build Settings are installed correctly, especially when you use app extensions (todayextension, shareextension) all versions must be the same.

answered Nov 26 '19 at 19:09

True Hekka

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This copy of libswiftCore.dylib requires an OS version prior to 12.2.0

6 Answers6

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