Does Xcode 12 (12A7209) crash Spotlight? Also Core Data template does not run in Simulator. Also makes Mac super hot and fans whirl?!

Developer Tools & Services Xcode Xcode Simulator Core Data

blurstoftimes OP

Created Sep ’20

Replies 47

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Is anyone else experiencing problems with the new Xcode 12 (build 12A7209)? Specifically:

Xcode crashes spotlight when running Simulator or Previews
Xcode makes Macbook Pro run very hot and fans kick up
Using a Core Data template with SwiftUI and running it in Simulator produces a blank white screen and never shows the timestamp list.

Made a feedback ticket using Feedback Assistant, and attached a copy-pasted diagnostic error report for the Spotlight crashing issue.

Is anyone else experiencing this? (I'm on a Macbook Pro 2017 touch bar) on Catalina MacOS.

Is this just me? It's not like this Xcode is in beta anymore, right? The Mac App Store has the updated Xcode 12, but I can see on the Apple Download website that there's an Xcode 12.2 beta as well.. I'm assuming Apple just decided to copy-paste the Xcode 12 beta 6 and rename it Xcode 12.0 for the 12A7209 build and expect everything to work out fine.

My Mac can barely run it without fans blazing and fingers melting as I tap my lava keyboard..

Boost

dep3 OP

Sep ’20

For the Core Data issue, wrap the body in a NavigationView.

Can anyone confirm that .toolbar requires a NavigationView?

arijo OP

Sep ’20

Same problem

Xcode 12.0.1
Catalina 10.15.7
MacBook Pro 2019

Dushihao OP

Sep ’20

same proplem

Mac OS Catalina 10.15.6
iMac
Xcode 12.0.1

ZubairovValeriy OP

Sep ’20

Same problem
MBP 16 2.4GHz i9 16Gb
Catalina 10.15.6

t.burger OP

Sep ’20

ios updated lastnight and now I have the same issue and can not run my project.

XCode 12.0.1(12A7300)
Catalina 10.15.7

mac mini (2018)

PKIY OP

Sep ’20

Same issue here

macOS Catalina - version 10.15.5
MAC mini (Late 2014)

jitendrafromhampton east OP

Sep ’20

Same issue that I'm facing after updating Xcode 11.4 to Xcode 12

Xcode 12
macOS Catalina 10.15.4
MacBook Air (2017)

Kernel_task is up 100% CPU and Spotlight crashes.

Can anyone have temporary solution for this?

libar OP

Oct ’20

I have the same issue. I solve it hopefully temporarily until a fix comes out:

Add the /Users/<username>/Library/Developer/CoreSimulator/ to the privacy tab in spotlight settings.

robertfromnanits OP

Oct ’20

I have the same issue

ArnavMotwani OP

Oct ’20

I thought is was just my Macbook air, im glad to know im not the only one who's experiencing this