Tag Archives: macOS

[Solved] Mac git clone error:xcrun:error:invalid active developer path(/Library/Developer/CommandLineTools)


After upgrading the MAC system, using git clone and other related commands on the terminal fails with an error

xcrun:error:invalid active developer path(/Library/Developer/CommandLineTools),missing xcrun at:/Library/Developer/CommandLineTools/usr/bin/xcrun


1. Check whether git has been installed

# command
which git

# outcome

Description git has been installed

2. View git help information

git --help

Error reporting is the same as above:

xcrun:error:invalid active developer path(/Library/Developer/CommandLineTools),missing xcrun at:/Library/Developer/CommandLineTools/usr/bin/xcrun

to sum up, GIT has been installed, but the GIT command cannot be used normally. It may be that the GIT installation package is damaged, so reinstall git

3. Reinstall Git

brew install git

The following error messages appear during installation:

Error: The following formula:
cannot be installed as a binary package and must be built from source.
Install the Command Line Tools:
  xcode-select --install

Error: Git must be installed and in your PATH!
Error: The following formula:
cannot be installed as a binary package and must be built from source.
Install the Command Line Tools:
  xcode-select --install

according to the prompt, you need to reinstall xcode-select

Solution: install xcode-select

To sum up, we need to reinstall xcode-select and execute the following commands on the terminal

 xcode-select --install

After installation, perform the following:

git --help

The correct output of information indicates that git has returned to normal and can be used



In the MAC environment, during the development of HarmonyOS, the project runs to the simulator and reports the following errors:


compileSdkVersion and releaseType of the app do not match the apiVersion and releaseType on the device.

Operation steps.

I. If the HDC tool environment variables are not configured, configure them as follows, and skip this step if they have been configured.

1. Open Mac terminal and enter the following command to open the bash_profile file.

open .bash_profile

2. In the bash_profile file, configure the environment variables, here the PATH path, refer to your own sdk path, version is the version corresponding to Toolschains under API Version7 in my own SDK, the value is

export PATH=$PATH:/Users/tangkun/Library/HarmonyOS/Sdk/toolchains/{}

3. Save the configured environment variables and enter the following command in the open terminal.

source .bash_profile

4. Restart the development tool DevEco-Studio.

Second, the following is the operation of configured HDC environment variables:
In the terminal terminal of DevEco-Studio, enter the following command:

. /hdc shell

(Windows environment does not need the previous . /hdc shell)

Next, enter the following command in the terminal, but this time you do not need to enter . /, in terminal my Huawei emulator output 6.

getprop hw_sc.build.os.apiversion

This apiversion version number 6 is smaller than the version number 7 in my project’s build.gradle and project’s build.gradle, so it causes my project to run on this apiversion version 6 emulator with the following direct error.

The version numbers of entry and application in the build.gradle:
compileSdkVersion 7 and compatibleSdkVersion 7


1. lower the compileSdkVersion and compatibleSdkVersion version numbers in the build.gradle file of entry and application to 6.

2. Use an emulator with Api 7 for debugging.

How to Solve MacOS ffmpeg killed Error

tags: MacOS Debug Tips


Recently, I wanted to download the live playback course in nailing with the tried and true method, but some errors suddenly appeared when executing ffmpeg on the command line:

[1]    40344 killed     ffmpeg



This problem can be solved by compiling and installing from the source code through the following command

brew tap homebrew-ffmpeg/ffmpeg
brew install homebrew-ffmpeg/ffmpeg/ffmpeg

At this time, enter ffmpeg in the terminal to get:

❯ ffmpeg
ffmpeg version 5.0 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 13.1.6 (clang-1316.0.21.2)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.0-with-options_2 --enable-shared --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libaom --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-demuxer=dash --enable-opencl --enable-videotoolbox --enable-neon --disable-htmlpages
  libavutil      57. 17.100/57. 17.100
  libavcodec     59. 18.100/59. 18.100
  libavformat    59. 16.100/59. 16.100
  libavdevice    59.  4.100/59.  4.100
  libavfilter     8. 24.100/ 8. 24.100
  libswscale      6.  4.100/ 6.  4.100
  libswresample   4.  3.100/ 4.  3.100
  libpostproc    56.  3.100/56.  3.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

[Solved] New MAC Unity Develop Error: error installing cocoapods

The new MAC system is 11.4, and the installed Xcode version is 13.2.1
after opening a unity project and switching to IOS platform, cocoapods is installed in the background, but an error is reported indicating that the installation fails:

ERROR: Error installing cocoapods:
       ERROR: Failed to build gem native extension.
   current directory: /Library/Ruby/Gems/2.6.0/gems/ffi-1.15.5/ext/ffi_c/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I /System/Library/Framewoks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0 -r ./siteconf20220311-4106-wxounc.rb extconf.rb
   mkmf.rb can't find header files for ruby at /System/Library/Framewoks/Ruby.framework/Versions/2.6/usr/lib/ruby/include/ruby.h

You might have to install separate package for the ruby development environment,ruby-dev or ruby-devel for example.

According to the error prompt and query from the network, it should be that a new Ruby Version needs to be installed, and the ruby provided by the system cannot be used
installing Ruby requires RVM, and installing RVM requires homebrew

Install homebrew

Use the command /usr/bin/Ruby - e" $(curl - fssl) is not used here https://raw.githubusercontent.com/Homebrew/install/master/install )"

After installation, execute brew update update.

Then execute brew -vto see the installed version

Install RVM

Install RVM curl -L https://get.rvm.io | bash -s stable

reload RVM environment source ~/.rvm/scripts/rvm

View RVM version RVM -v

Install Ruby

Check the known version of ruby RVM list known

check the installed version of ruby RVM list

Install a ruby version. I chose 2.6.5 RVM install 2.6.5

After installation, check the Ruby Version Ruby -v. If it is not the version just downloaded, I need to use the command to cut the version

Install cocoapods

After the above installation, execute sudo gem install cocoapods -n/usr/local/bin to install cocoapods
after the installation, execute pod --version to view the version of cocoapods

Here, for unit packaging, cocoapods are not completely installed. You need to continue to follow the following steps.

Command + Shift + G, open to the folderpop-up window, and enter ~/.cocoapods, after opening the cocoapods folder, delete all the contents under it, create a new repos folder, open the command line tool, and execute the following three commands in turn

1) cd ~/.cocoapods/repos
2) git clone --depth 1 https://github.com/CocoaPods/Specs.git master
3) pod repo update

In this way, the Xcode project exported by unity will have Xcworkspace file (in case of problems in cocoapods environment, the exported Xcode project only has .xcodeproj file, and there are many exceptions when using this file for packaging press conference), and then open the file with Xcode for subsequent publishing

[Solved] MacOS Compile ffmpeg Error: ERROR: openssl not found

On a whim today, I suddenly want to start studying the source code of ffmpeg. After downloading all the dependent libraries, I use the command configure

sh configure --prefix=/usr/local/ffmpeg \
--enable-gpl \
--enable-version3 \
--enable-nonfree \
--enable-postproc \
--enable-libass \
--disable-libcelt \
--enable-libfdk-aac \
--enable-libfreetype \
--enable-libmp3lame \
--enable-libopencore-amrnb \
--enable-libopencore-amrwb \
--enable-libopenjpeg \
--enable-openssl \
--enable-libopus \
--enable-libspeex \
--enable-libtheora \
--enable-libvorbis \
--enable-libvpx \
--enable-libx264 \
--enable-libxvid \
--disable-static \
--disable-x86asm \

appear. Error: an error is reported when OpenSSL is not found. The version of OpenSSL I use is

Then the solution is seen from here

export LDFLAGS="-L/usr/local/opt/openssl/lib"
export CPPFLAGS="-I/usr/local/opt/openssl/include"

After writing, configure succeeded!

If you encounter some other problems, such as the following, you only need to delete the corresponding file and reconfigure it

config.h is unchanged
libavutil/avconfig.h is unchanged
libavfilter/filter_list.c is unchanged
libavcodec/codec_list.c is unchanged
libavcodec/parser_list.c is unchanged
libavcodec/bsf_list.c is unchanged
libavformat/demuxer_list.c is unchanged
libavformat/muxer_list.c is unchanged
libavdevice/indev_list.c is unchanged
libavdevice/outdev_list.c is unchanged
libavformat/protocol_list.c is unchanged
ffbuild/config.sh is unchanged

[Solved] Homebrew Error: xcrun: error: invalid active developer path

Recently, I found an error when installing things with homebrew. It turned out that homebrew was not adapted after my Mac updated maxos big sur11. In addition, the Xcode tool was deleted before, resulting in the following error:

Input directly at the terminal and xcrun will be installed

xcode-select --install

It can be used directly after installation

[Solved] Mac homebrew error: Error: homebrew-core is a shallow clone.

Mac command line execution:

brew update 

The following error is reported:

  homebrew-core is a shallow clone.
To `brew update`, first run:
  git -C /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core fetch --unshallow
This command may take a few minutes to run due to the large size of the repository.
This restriction has been made on GitHub's request because updating shallow
clones is an extremely expensive operation due to the tree layout and traffic of
Homebrew/homebrew-core and Homebrew/homebrew-cask. We don't do this for you
automatically to avoid repeatedly performing an expensive unshallow operation in
CI systems (which should instead be fixed to not use shallow clones). Sorry for
the inconvenience!

The cause of this problem is usually the problem caused by the system update.

Solution: delete the homebrew core and then update it

cd /usr/local/Homebrew/Library/Taps/homebrew
rm -rf homebrew-core
brew upgrade

MacOS rvictl -s Error: Starting device failed [How to Solve]

After mac os big sur, the security of Apple system is improved, which causes rvictl -s to fail to create a virtual network card.


Restart the mac in recovery mode.
1. After booting, press and hold command + r until you enter the boot page
2. Select terminal in the upper left menu bar, type csrutil disable, and then select reboot in the upper left menu bar.
3. After rebooting, go to Security and Privacy, open the small lock in the lower left corner, there is an Apple. The computer will restart automatically.
3. Run rvictl -s device udid again and it will work.

MAC MYSQL Start Error: The server quit without updating PID

1. System configuration information:

System MacOS bigsur 11.6
MySQL 8.0.26

2. Start MySQL service:

sudo /usr/local/mysql/support-files/mysql. server start

The error message is as follows:

Starting MySQL
.. ERROR! The server quit without updating PID file (/usr/local/mysql/data/jinjideleishen.local.pid).

Solution commands
mac default user is _mysql, under linux the default user of mysql is mysql
Use chown to change the owner of the specified file to the specified user or group
-R : Process all files in the specified directory and its subdirectories

sudo chown -R _mysql:_mysql /usr/local/mysql/

Restart successful:

 sudo /usr/local/mysql/support-files/mysql.server restart
 ERROR! MySQL server PID file could not be found!
Starting MySQL
.................................................... SUCCESS!

3. Stop MySQL service

sudo /usr/local/mysql/support-files/mysql.server stop

4. Restart MySQL service

sudo /usr/local/mysql/support-files/mysql.server restart

How to Solve M1 chip import numpy Error

Error report of M1 chip import numpy

Environmental installation method:

miniforge – python3. 9 numpy 1.21.1

Operation error:

## terminal/pycharm error
import numpy
import pandas 

Error Messages:
Importing the numpy C-extensions failed. This error can happen for
many reasons, often due to issues with your setup or how NumPy was
We have compiled some common reasons and troubleshooting tips at:


At the same time, the python version and numpy version are given, and many files in the miniforge folder no such file are mentioned repeatedly


conda install openblas

Import again works normally