Xcode 12.3 Release Simulators Dock Yellow / buggy
Source:Are you using a MacBook Pro? I was happened the same bug.
Solved in the following ways.
Step1: Unplug all cables, including the charging cable
Step2: Restart the iOS simulator
https://stackoverflow.com/questions/65299337/xcode-12-3-ios-14-3-simulators-yellow-dock-yellow-translucent-issues
Maybe it will help you guys too...
Restart the Simulator app if needed. There is no need to unplug the cables etc. By default, the "Automatic" option is selected, and it seems that when you start the Simulator app without being plugged into the power source, an integrated GPU is used. This is probably why the cable unplugging and plugging again is working for some people.File → GPU Selection → Prefer Integrated GPU
I noticed that the yellow tint glitch only appears when a discrete GPU is used. Forcing the Simulator app to prefer an integrated GPU solves the issue for me.
Unfortunately, when integrated GPU is used, even basic UI animations are miserably slow in the simulator.
I rebooted the Mac after installing Xcode and updated the project to the new settings proposed by Xcode.
All tests on iPhone 12 Pro Max simulator iOS 14.3.
I do no not experience the exact same problems, but some others:
In a TabBarController, the tabBar has turned yellow (color of a view that covers the whole screen)
In a view, I have an alert. The top left and right corners are now fuzzy: on about 30 pixels wide and 80 pixels high (but not uniformly on this whole rectangle), we don't see the alert background but the view that is behind; just as if those parts had ben snacked by some rodent…
When I delete the app from the iPhone, the top button "Edit home screen" is no more lisible (text black on black or transparent on black)
I tried the Prefer Integrated GPU option: no change.
As a conclusion, I will stay with Xcode 12.2. for the time being.
File → GPU Selection → Prefer Integrated GPU (and simulator restart) does not work for me.
I'm on Catalina, iMac 2017.
So if you run Xcode 12.3 on these machines you are required to use the iOS 14.2 Simulators, which work as expected.
Ticket filed: FB8942599
Change the simulator settings to use the integrated GPU (not ideal because simulator performance will suffer)
Install and use the iOS 14.2 simulator