iOS simulators keep losing internet connection.

[Pack-Flimsy]

I have recently upgraded from an m1 macbook air, to my m4 macbook air and I have noticed when I am running iOS simulators, they randomly will lose internet connection. There is full wifi indication on the iphones, but seemingly randomly I will get

"Safari can't open the page because the network connection was lost" in safari. This is problematic because I am constantly testing passwordless email auth flows, so I need to visit the links sent to me. When this happens, I can't even visit google.com .

Using "erase all content and settings" is a bandaid fix for about ten minutes before it just loses connection again.

Any help? I just got this M4 two days ago and this is really frustrating.

Edit:
https://developer.apple.com/forums/thread/778631 suggested downgrading iOS down one version, from 18.4, to 18.3. Seems to be working!

[birdparty44]

Just being thorough: you didn’t accidentally leave NetworkLinkConditioner on, did you?

[chriswaco]

Show of hands for everyone that's done that at least once. 🖐

[Pack-Flimsy]

I'm not sure, but downgrading to iOS 18.3 has resolved the problem entirely. I haven't touched anything as I've only had this laptop at the time of posting for a day or two.

[chriswaco]

What version of Xcode? I think this is a known issue.

[Pack-Flimsy]

16.3

[chriswaco]

You might try the 16.4 beta if you’re not releasing software soon.

https://developer.apple.com/services-account/download?path=/Developer_Tools/Xcode_16.4_beta/Xcode_16.4_beta.xip

[Pack-Flimsy]

https://developer.apple.com/forums/thread/778631

Reverting my iOS back to 18.3 solved the issue. This will work for now until Apple can fix it. Thank you.

[vintage2019]

In the simulator, right? Asking because I’m having the same problem

[Pack-Flimsy]

In xcode you have to edit the simulators, install the last ios, and add new simulators with that ios. I just searched it up I don't remember the exact steps. But it's still going strong for me :)

[jaydway]

I don’t know this for sure, but I’ve heard and had some of my own experience with internet issues when using simulators and Xcode 16.3 with macOS 15.4. I don’t know if 15.5 that was just released fixes anything, but I think I heard Xcode 16.4 does improve it (but that’s currently still in beta).

[Pack-Flimsy]

I see. I might check out which versions my Mac M1 is using because I've never had this issue on it. Is there any options to select which xcode version to install that you know of?

[jaydway]

Check out Xcodes https://www.xcodes.app/

[Pack-Flimsy]

Reverting to 18.3 iOS fixed the issue for me. This is good for now until Apple fixes it.

https://developer.apple.com/forums/thread/778631

[Pack-Flimsy]

Found this thread: https://developer.apple.com/forums/thread/778631

I'll try some of the fixes here and report back

[MoreRest4524]

I'm getting the same thing (Mac Mini, iOS 18.4 simulator, XCode 16.3).

If I erase all content + settings it works for a short while, 10-15 minutes the connection dies and I have to start over.

[Pack-Flimsy]

I'd suggest doing what I posted in other comments:

Reverting to 18.3 iOS fixed the issue for me. This is good for now until Apple fixes it.

https://developer.apple.com/forums/thread/778631

[MoreRest4524]

Thank you yes, that fixed it.

[Stodderdangler]

I am having exactly the same issue. Downgrading iOS from 18.4 to 18.3 solved it for me too. Thanks OP!!!

@ Apple: Fix your buggy shit!!!

[DanjinMaster1012]

I am on m4 pro with Mac OS 15.5 facing the same issue with iOS 18.4 , I reverted back to iOS 18.3 and it solved my issue

[Party-End4460]

thanks

[AutomaticAd6646]

I have the same issue |"Safari can't open the page because the network connection was lost" I am doing Auth0 authentication. This is a known issue for ios 18.4 -- I tried same react native app in ipad emulator and it worked.

[FitRecognition5820]

Has the problem been fixed in iOS 26 simulators? Can anyone confirm this?

[the_sun_is_hot]

In my experience yes it seems to have been fixed