If you like me owning more than one Mac and using one of them to control the other via macOS built-in Screen Sharing feature, you may occur this issue after you upgrade your macOS to Sierra.
macOS Sierra introduces a new feature Universal Clipboard which can share the same clipboard among iOS and macOS devices. This sounds cool, but as it’s technically a part of Continuity feature, it would require Bluetooth to work.
So the problem is, when I control my Mac mini from my MacBook Pro via Screen Sharing in the same network, with the Shared Clipboard enabled, the Universal Clipboard would still always try to “sync” copied content via Bluetooth instead of using Screen Sharing Shared Clipboard.
It’s ok if both of your Macs are at your hand, but it’s a disaster if they’re in different rooms, Universal Clipboard via Bluetooth would become really slow to connect to each other, and this issue could even make your VNC drop connection if you copy images to your clipboard.
So here’s the solution, just disable Bluetooth on your Mac mini, and wait Apple to fix this bug.
$ sudo /usr/libexec/repair_packages --verify --standard-pkgs /
$ sudo /usr/libexec/repair_packages --repair --standard-pkgs --volume /
Install required packages via Homebrew:
$ brew install gpg gpg-agent pinentry-mac
Edit and add the following lines in
Edit and enable
Then add the following line to your shell profile:
eval $(gpg-agent --daemon --sh)
Apple introduces System Integrity Protection (SIP) as a security feature for OS X El Capitan (10.11), which prevent ProxyChains-NG working as before, you have to disable SIP to make it work:
- Reboot your Mac into Recovery Mode by pressing command-R
- Open Terminal and type
csrutil enable --without debug:
$ csrutil enable --without debug
$ csrutil: requesting an unsupported configuration. This is likely to break in the future and leave your machine in an unknown state.
$ Successfully enabled System Integrity Protection. Please restart the machine for the changes to take effect.
Just ignore the warnings and then restart your Mac.
You can get all proxy bypass domains using:
$ networksetup -getproxybypassdomains "Wi-Fi"
Wi-Fi should be your current interface, you can also update it using:
$ networksetup -setproxybypassdomains "Wi-Fi" \
man networksetup for more information
If you have the environment variable
XDG_DATA_HOME set, the installation is located at
$XDG_DATA_HOME/letsencrypt. Otherwise, it is located at
~/.local/share/letsencrypt. You can simply delete this directory. You can also delete configuration, work, and log directories which by default are stored at
/var/log/letsencrypt respectively. The directory where you cloned our git repo can also be deleted.
Let’s Encrypt also installs some OS dependencies and how you remove these would be very OS specific. To see what dependencies were installed, take a look at the files in the bootstrap folder at the root of our git repo (link). Take a look at the shell script for your OS to see what packages are required. You can uninstall these packages through the normal means of your OS, but make sure they aren’t required by any other programs on your system.
Source: Uninstalling letsencrypt – Let’s Encrypt Community Support
最近重灌了 El Capitan，在找「三星 850 Pro 是否可以用 trimforce 開啟 Trim 支援」時發現了下面的信息：
Samsung SSD 850 PRO 512GB:
Capacity: 512.11 GB (512,110,190,592 bytes)
Model: Samsung SSD 850 PRO 512GB
Serial Number: S1SXNSAF806527E
Native Command Queuing: Yes
Queue Depth: 32
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Medium Type: Solid State
TRIM Support: No
Bay Name: Lower
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Verified