Category Archives: Tutorial

Instructions to turn off Device Enrollment Notifications on MacOS Catalina 10.15

Device Enrollment

If you find this post, your device may be stuck on Profile MDM (Mobile Device Management). The expression is in the upper right corner of the screen repeatedly appears: “Device Enrollment” is quite annoying, or during the reinstall the machine appears the following screen: You searched Google but the previous instructions did not seem to […]

How to snap an app window to 1/2 or 1/4 screen in macOS


On macOS, you also have the function of attaching windows to half the screen like Windows, the way is very simple. Drag and hold the “full screen” icon, the blue circle button on any window. When you hold here, the screen will zoom out slightly for you to “attach” this window to the left or […]

How to turn off System Integrity Protection (SIP) to run App Cr4ck on Catalina 10.15


Since Mac OS 10.11, Apple has increased security features with System Integrity Protection (SIP), so some software that has high access to the error system cannot be installed. Especially on macOS Catalina, turning off gatekeeper is not enough. You need to disable SIP to be able to run applications outside of the App Store. To […]

How to use rsh on FreeBSD12

Almost a year ago, the rsh and rlogin r commands were removed from FreeBSD CURRENT. This will be FreeBSD 12.0-RELEASE. Recently, since virtual environments are also used, it has rather increased to construct a closed network and communicate using rsh. That’s why deleting the r command is a hassle. When sending large capacity with rsync, […]