blocks|key|2489060|text|在我的例子中:+UnCheck远程模拟器|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2489061|📷|atomic|offset|length|2489062|​|2489063|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/7268f6a5a2838a704864f206dd915117.png|imageAlt^0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@$E|T|F|U|1|V]]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P|Q|-4]]]]

In my case: UnCheck Remote Simulator to Windows
<img src="https://i.stack.imgur.com/k8SbZ.png" alt="In my case: UnCheck Remote Simulator to Windows" />

blocks|key|28679|text|我在过去的两天里遇到了同样的问题，并通过删除最新版本的XCode+12.5解决了这个问题。从苹果网站下载以前版本的代码，即12.4，并安装，在应用程序中移动下载的xcode文件，并在XCode上检查它工作正常，最新版本的windows+12.5不稳定|type|unstyled|depth|inlineStyleRanges|entityRanges|data|28680|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I am facing the same issue from last two days and solved this as well by removing the latest version of XCode 12.5.
Download the previous version of code i.e 12.4 from apple site and install
Move the downloaded xcode file in application and check on windows
It works fine
Latest version of XCode 12.5 is not stable

blocks|key|28827|text|我确认这个问题是目前(2021年5月)由Xcode12.5升级引起的。在我将降级回Xcode12.4之后，模拟器又开始正常工作了。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|28828|我尝试将Visual+Studio+for+Windows升级到最新版本16.9.4，但没有帮助。我启动了Visual+Studio安装程序来重新安装Xamarin，也没有帮助。|28829|只有当我删除了Xcode12.5(使用这个外壳脚本https://onexlab-io.medium.com/uninstall-xcode-from-macos-eca1b69dc836)并安装了版本12.4+(从这里的How+to+download+Xcode+DMG+or+XIP+file?中的XIP+archive+)时，它才开始工作。|28830|entityMap|0|LINK|mutability|MUTABLE|url|https://onexlab-io.medium.com/uninstall-xcode-from-macos-eca1b69dc836|1|https://stackoverflow.com/questions/10335747/how-to-download-xcode-dmg-or-xip-file^0|Y|V|0|0|2H|0|0|4T|P|1X|0|33|12|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@$9|12|A|13|1|14]|$9|15|A|16|1|17]]|E|$]]|$1|J|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]|R|$5|M|N|O|E|$P|S]]]]

I confirm the issue is currently (May 2021) caused by Xcode 12.5 upgrade.
After I downgraded back to Xcode 12.4, the simulators started to work again with no problem.
I tried to upgrade Visual Studio for Windows to latest version 16.9.4, did not help. I launched Visual Studio Installer to reinstall Xamarin, did not help either.
Only when I removed Xcode 12.5 (using this shell script <a href="https://onexlab-io.medium.com/uninstall-xcode-from-macos-eca1b69dc836" rel="noreferrer">https://onexlab-io.medium.com/uninstall-xcode-from-macos-eca1b69dc836</a>) and installed version 12.4 (from XIP archive from here <a href="https://stackoverflow.com/questions/10335747/how-to-download-xcode-dmg-or-xip-file">How to download Xcode DMG or XIP file?</a>) it started to work.

blocks|key|2488966|text|您可能需要取消选中“远程模拟器到Windows”。我只是通过这样做为自己修复了这个问题。然而，我试图在我的Mac端启动iOS模拟器(通过Parallels运行Windows+)。您可能正在尝试在windows中启动模拟器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2488967|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You may need to uncheck "Remote Simulator to Windows." I just fixed this issue for myself by doing so. However, I was trying to launch on the iOS simulator on my Mac side (running Windows vm via Parallels). It seems you might be trying to launch the simulator in windows.

blocks|key|30306|text|如果你需要一个快速的解决方案，降级VS和Xcode的版本，对我来说这是可行的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|30307|30308|VS+2019+-+16.9.3|unordered-list-item|30309|Xcode+-|30310|-14.14.2.5|30311|对于物理设备，请确保未在工具>选项>+Xamarin+>+iOS设置中启用热重启|30312|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

If you need a quick solution, downgrade the version of VS and Xcode, for me this works:
<ul>
<li>VS 2019 - 16.9.3</li>
<li>Xcode - 12.4</li>
<li>Xamarin.iOS - 14.14.2.5</li>
</ul>
And for physical devices make sure Hot Restart is not enabled in Tools &gt; Options &gt; Xamarin &gt; iOS settings

blocks|key|28919|text|昨天将mac升级到Big+Sur和Xcode+12.5后也遇到了同样的问题。重新启动和删除obj/bin/.vs文件夹没有区别。修复方法是显式地在Xamarin+options+iOS设置中输入Xcode路径-即使这是默认设置-取消勾选远程模拟器到Windows，然后从选项对话框配对/连接到mac。关闭对话框并重新打开后，远程模拟器被再次选中。我取消选中它，关闭对话框，然后重新打开它再次检查-它这次被关闭了。现在一切正常。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|28920|我还运行了mac+VS，并让它在所有这些过程中进行更新。|28921|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Just had the same problem after upgrading mac to Big Sur and Xcode 12.5 yesterday. Reboots and deleting obj/bin/.vs folders made no difference. The fix was to explicitly type the Xcode path into Xamarin options iOS settings - even though it was the default - untick Remote Simulator to Windows then pair/connect to mac from that options dialog. After closing the dialog and reopening it Remote Simulator was checked again. I unchecked it, closed the dialog and reopened it to check again - it was closed this time. All works fine now.
I also ran mac VS and let it update in the midst of all this.

blocks|key|28610|text|我有同样的问题，从昨天开始，以解决我卸载了"Xamarin+iOS模拟器“，现在它工作…|type|unstyled|depth|inlineStyleRanges|entityRanges|data|28611|这可能是你的问题的解决方案！|28612|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I have the same issue since yesterday, to resolve that I uninstall the "Xamarin iOS simulator" and now it works...

it may be a solution for your issue!

blocks|key|2699387|text|你已经解决这个问题了吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2699388|今天我也遇到了同样的问题。我试着在Mac上打开Xcode，它显示需要安装额外的工具。我让它安装并再次尝试打开/退出Visual+Studio+for+Mac，Xcode，Simulator+(不确定是否相关)|2699389|现在远程模拟器又可以正常工作了。|2699390|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Did you resolved the issue already?

I bumped onto the same issue today. I tried opening Xcode on Mac and it says it need to install additional tools. I let it install and try open/quit Visual Studio for Mac, Xcode, Simulator again (not sure if it is related)

Now to remote simulator works fine again.

blocks|key|28810|text|我遇到了同样的问题，我意识到我的装有VS的PC与装有Xcode的Mac在不同的网络上，从而解决了这个问题。一旦我把两台机器放在同一个网络上，这个问题就消失了。希望能有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|28811|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same issue and i resolved it by realizing that my PC with VS was on a different network than my Mac with Xcode. Once i put both machines on the same network the issue went away. Hope it helps.

I am trying to use the Xamarin iOS simulator but it fails on launch with a "The device {guid} was not found".

I have my environment settings like...

<a href="https://i.stack.imgur.com/TMMfE.png" rel="noreferrer"><img src="https://i.stack.imgur.com/TMMfE.png" alt="enter image description here"></a>

and when I run I see...

<a href="https://i.stack.imgur.com/c1ikS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/c1ikS.png" alt="enter image description here"></a>

then...

<a href="https://i.stack.imgur.com/gckte.png" rel="noreferrer"><img src="https://i.stack.imgur.com/gckte.png" alt="enter image description here"></a>

researching the error, the recommendation is to explicitly set the XCode path which I have done, but I get the same error. Also, notice I am connected to our build Mac.

<a href="https://i.stack.imgur.com/JHRm9.png" rel="noreferrer"><img src="https://i.stack.imgur.com/JHRm9.png" alt="enter image description here"></a>

I have a coworker connected to the same Mac with the same computer and VS version I am on, and his iOS simulator works fine. I have uninstalled/reinstalled the simulator and restarted Visual Studio (2017RC).

I appreciate any pointers someone might have!

UPDATE

I reinstalled my Windows 10 OS thinking I had a corrupt install. Unfortunately on a clean machine with 2017RC, the simulator still fails in the same way as I described above.

Xamarin iOS simulator issues - The device was not found

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在尝试使用Xamarin iOS模拟器，但它在启动时失败，并显示“未找到设备{guid}”。我有我的环境设置，比如...​​当我奔跑的时候我看到..。​​然后..。​​研究错误，建议显式设置XCode路径，但我得到了相同的错误。另外，请注意，我已连接到我们的构建Mac。​​我有一个同事连接到与我相同的电脑和VS版本的苹果电脑上，他的iOS模拟器工作正常。我已经卸载/重新安装了模拟器，并重新启动

问Xamarin iOS模拟器问题-未找到设备
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