Opening the Mac again after the weekend prompted this error

This is a mistake that has not been encountered before ah, my mood is very complex…

Just clicked ok, and then ignored it, thinking it wasn’t a big deal… When I was ready to run the simulator, tragedy happened…

Damn, my Xcode emulator won’t open ！！！！

I can’t stand………

Then began the journey of Google, Baidu… Found a lot of reasons, also found a lot of ways… Then I gradually understand some reasons: 1. My system version is OS X EI Capitan 10.11.5, and the latest version is macOS Sierra. Because some people online said to update the system is good, but I didn’t do that… Because one of my friends said that the new system is inconvenient, but I am too lazy to update it. I have two Xcodes installed on my Mac, one 7.3.1, and the latest 8.0 – many people say that the two versions conflict, probably opened at the same time…

Until I saw a buddy’s reply…

Solutions:

The following methods resolve CoreTelephony Trace File error: The permission of the/TMP directory is incorrect. You can modify the permission after disabling SIP protection. 1. Restart the Mac, press Command+R until the Apple logo appears, and enter Recovery Mode. 2disableSudo chmod 0777 /private/ TMPCopy the code

“There is a security-related mode in OS X El Capitan called System Integrity Protection (SIP) that prevents software from running as root on a Mac, When you upgrade to OS X 10.11, you may see some applications disabled, which you may install from a terminal or third-party software source. This is convenient for most users, but some developers or advanced Mac users don’t need it. However, novice Mac users are cautioned not to turn off security Settings.

Tada…… Just run the Xcode emulator again

< < < specific reasons also want to ask god to point out…