"Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed"

Developer Tools & Services Xcode
sreddy142 OP
Created Nov ’20
Replies 18
Boosts 2
Views 15k
Participants 35
I recently got a new MacBook and I'm trying to get my projects up and running on it. When I run on an iOS 14.2 device, it works fine. But whenever I try 13.7 or lower it won't let me run and this error pops up

Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed

I would like this to work so I can test on older devices on this laptop.

Note: I got the new M1 chip MacBook so if that could be an issue please do let me know.
Replies  18
Boosts  2
Views  15k
Participants  35
MXStudios OP
Nov ’20
Same exact issue and it's killing me. I am using a new Mac Mini with M1 chip. I assume it's the Mac and not Big Sur. It only works with the simulator packaged with Xcode.

Very frustrating


1
licai OP
Nov ’20
Same issue
1
ahzzheng OP
Dec ’20
Same here! Did anyone find a workaround?
1
ahzzheng OP
Dec ’20
Here's some similar problems:
2
ahzzheng OP
Dec ’20
Updating to Big Sur 11.0.1 worked for me!
1
jweigel OP
Dec ’20
I can confirm that this does work after a system update. I am not sure if it is the update that fixed it or if just a restart was needed.
0
Rice888 OP
Jan ’21
I had the same issue after reinstalling Xcode on my MacBook Pro (15-inch, 2018).
I can install apps on actual device iPhone 8...
0
Rice888 OP
Jan ’21
It was solved by executing the following.
Code Block 
sudo chmod 1777 /Volumes/Macintosh\ HD/private/tmp

linkText
8
iOS_farley OP
Jul ’21

This also worked for me. Thank you!

0
mrahib OP
Jan ’22

I am having MacBoo Pro Intel chip, updated my Mac OS Big Sur 11.6.3

Working for me !!

1
mrahib OP
Feb ’22

I was facing this issue since long time, and finally got the solution by running those two cmds

sudo chown root:admin /tmp; sudo chmod 1777 /tmp

and

sudo chown root:wheel /private/tmp; sudo chmod 1777 /private/tmp
2
tomkausch OP
Jul ’22

I have encountered this problem after a fastlane update. Clearing the cache did help!

~/Library/Developer/CoreSimulator/Caches
36
benedge OP
Aug ’22

Yep, deleted the caches in this folder and it all started working again.

1
Dunan OP
Sep ’23

It's work for me too

0
Gangadharbonda1985 OP
Feb ’24

It worked for me too by deleting the cache

1
"Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed"
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