Add arcfour Cipher to Mojave 10.14

Im trying to use the arcfour cipher with SSH. Yes, I am aware of the risks, but I have my own reasons for wanting to use it. When I list available ciphers, it’s not there. Is it possible to add it in?

Available ciphers:

$   ssh -Q cipher 3des-cbc aes128-cbc aes192-cbc aes256-cbc aes128-ctr aes192-ctr aes256-ctr 

Attempt to use arcfour:

$   ssh -c arcfour file2 Unknown cipher type 'arcfour' 

Android Emulator on MacOS 10.14 has internet only after restarting machine

I’ve search the internet far and wide for this issue but didn’t seem to have success so far. What I am experiencing:

I’ve set up the following environment:

  1. Android Studio
  2. Android Emulator using API 28
  3. My OS is MacOS 10.14.3
  4. Using it to build a React Native app

At the beginning I didn’t have any internet, so I’ve added DNS of and to my System Preferences / Network / DNS. Also I start my avd and tell it to use those dns settings.

After I start my OS fresh and load up the avd I do have internet, loading pages via the Chrome browser. After a little while, though, maybe a minute or two the internet is dropping. Device shows I’m connected to Wi-Fi but no internet. Also Chrome stops loading pages.

Did someone experience the same problem? I’ve looked through logs and ran avd with -verbose option but nothing legitimate shows up.

What I’m suspecting:

  • Either the number of internet connections is maxed out (read of such a bug somewhere)
  • or file descriptors of the MacOS are maxed out

Nevertheless I don’t know how to find out which is it, or how to fix it.

I’d be very happy if someone might be able to help.

Thanks in advance.

How to create a custom macOS Mojave 10.14 read-only boot volume?

5 or 10 years ago it was common for people to create customized bootable OS X .iso or .dmg images & burn them to CD or DVD, mostly for hard disk data recovery purposes. There were quite a few articles from that era detailing the process of customizing OS X to successfully boot and have a fully-featured GUI while in read-only mode.

With the decline of CD/DVD burning generally I haven’t found much currently info about making customized, bootable, read-only macOS Mojave installs.

Here’s what I want:

  • A fully-operational macOS Mojave Startup Disk (not an installer) on a read-only hard drive or USB stick. (I have a true read-only-capable USB thumb drive.)

  • I want to be able to log in normally, use Finder normally, and launch basic apps like TextEdit or a web-browser.

In my testing so far, I have tried using Carbon Copy Cloner to clone my normal boot drive to my special configurable Read/Write + Read/Only USB thumb drive.

In normal R/W mode the USB stick boots as expected, all the way to the Desktop/Finder.

When I set the USB stick to R/O (read-only), the same macOS 10.14 config starts to boot, but about 10% of the way through the boot progress bar (before any user-login prompt appears,) the Mac (a 2018 MacBook Pro) just powers off with no warning.

Any tips, suggestions, or pointers to on-line guides for getting this working?

How can I create a new user through terminal macOS 10.14

I am trying to write a script to add a user to a computer. These will not be admin accounts and should be staff accounts. I ran the following script and can login to the account but I can’t access any files, create any files, or save any files to the computer.

Ultimately I would like to run this to remove 5 user accounts and all of their information and then create 5 new accounts (this is in a classroom where I have 36 computers) but I am struggling to create a single user correctly with the following script.

Any help would be much appreciated.

#!/bin/bash  USERNAME=per1 FULLNAME="Period 1" PASSWORD="test" SECONDARY_GROUPS="staff"   # ====  if [[ $  UID -ne 0 ]]; then echo "Please run $  0 as root." && exit 1; fi  # Find out the next available user ID MAXID=$  (dscl . -list /Users UniqueID | awk '{print $  2}' | sort -ug | tail -1) USERID=$  ((MAXID+1))  # Create the user account dscl . -create /Users/$  USERNAME dscl . -create /Users/$  USERNAME UserShell /bin/bash dscl . -create /Users/$  USERNAME RealName "$  FULLNAME" dscl . -create /Users/$  USERNAME UniqueID "$  USERID" dscl . -create /Users/$  USERNAME PrimaryGroupID 20 dscl . -create /Users/$  USERNAME NFSHomeDirectory /Users/$  USERNAME  dscl . -passwd /Users/$  USERNAME $  PASSWORD   # Add use to any specified groups for GROUP in $  SECONDARY_GROUPS ; do     dseditgroup -o edit -t user -a $  USERNAME $  GROUP done  # Create the home directory createhomedir -c > /dev/null  echo "Created user #$  USERID: $  USERNAME ($  FULLNAME)" 

In macOS 10.14 (Mojave), can Finder remember previously opened tabs like Safari pin tabs?

First of all, I am not asking to re-open Finder tabs on OS reboot, we all know it works.

I am asking for a solution when I accidentally clicked on the red-cross (aka close window button) on Finder window, it cause Finder to lose all currently opened tabs.

I know this is the expected behavior, but can I change it somehow? I have come to rely on it in macOS 10.12-10.13 (Sierra and High Sierra), when Finder window always remember previously opened tabs even if you close it yourself.

Some say the behavior in 10.12/10.13 is a bug, other argues it was working in Mavericks 10.9, but was broken by Apple in Yosemite 10.10, and later fixed then re-break. Both could be true. But is there a solution to get this behavior back?

The best I could find is a AppleScript that open tabs, but it doesn’t really restore tabs as it simply doesn’t have the information to restore a previously closed window.

Is there a solution out there I am not aware of?

10.14: Only display full path in a Finder window’s title bar and not in its tabs?

I just finally updated to Mojave, and there’s a new behavior in the Finder for those of us that set the hidden preference _FXShowPosixPathInTitle to true.

Previously when using that setting in 10.13, tabs in Finder windows would only display the name of their folder. Now they display the full path of their folder, just like the title bar.

I have a Finder window with eight tabs in it that I use as part of my daily workflow. Sufficed to say it’s now impossible to tell which tab is for which folder because I can only see the first twelve characters of the path. (i.e. /Users/myusername/ — not very helpful!)

Is there any way of getting the old behavior back? Or perhaps some other solution to this problem?

Reduce or disable DNS cache in 10.13 and 10.14

I’m trying to get a hold of the property list, I’m guessing, that specifies the TTL or the amount of records held of the DNS cache of the system, if is not user/root accessible, then command that edits it, hopefully.

I want to reduce the TTL or eliminate it, my local DNS servers are fast enough for continuous querying

I do not want to flush it, I already know the commands for that, even made a script out of it. It takes like nothing but you still have to sudo -i to become root and go into root’s home folder, where it made the most sense to store it if I’d have to superuser-myself anyway.

Reduce or kill, not flush. 🙂 Thanks!

Will macOS Mojave 10.14 slow down an early 2011 13″ MacBook Pro?

I am currently running OS X El Capitan on my early 2011 13″ MacBook Pro. I am thinking of upgrading to macOS Mojave, but would like to know if it would slow my MacBook Pro because of my specs?

Please see more info on the specs below:

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I’m not using an SSD and my current available space is 140GB (total is 320GB), though I always make sure I don’t go below 100GB available space.