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macos 10.14 beta 1 download

CGLFlushDrawable in OpenGL not waiting for monitor refresh on OS X 10.13 and 10.14

I’m using DoubleBuffering and have swap interval set to 1, so flushBuffers should block openGL code until the swap is completed.

I therefore have this setup on a separate thread:

for(i=0 i< numFrames i++) {

// some drawing stuff

[[NSOpenGLContext currentContext] flushBuffer];


// get the time


In prior versions of OS X (and with different hardware), this works fine: the vast majority of the time I have time intervals corresponding to one frame, and occasionally I have two.

But now (on new hardware and 10.13 and 10.14), this fails. I have a huge number of very low intervals (sub ms), and some large intervals, but no obviously clustering of intervals around integer numbers of frames.

BTW, I’m doing this because it’s critical that frames are delivered in a regular, dependable manner, and, if they aren’t, I want to know about it.

I’m really at a loss, and am thinking the only possibility is that something has changed with OS X and the opengl drivers, but Apple makes it hard to go backwards OS version-wise, so I thought I’d get some advice before I go down that road.

Any ideas?

How to isolate systemic hangs in macOS 10.14?

I’m struggling with some kind of a hang that is very elusive. Apple can’t seem to isolate the problem after many sysdiagnose submissions. It predominantly happens in instances of Google Chrome, Finder and even Activity Monitor (and other random apps) sometimes when certain actions are taken. The only way to recover is a sudo reboot from he shell.

No drives are actually failed or failing as one might expect. This is on a Mac Pro with ECC memory and all RAM is showing as good. I have to think that there’s some dtrace tooling that would facilitate tracking down the precise point of the hang. It feels as though it’s some form IO failure, but there’s no indication of where or how…

What options exist for tracking down such issues at a very low level?

Mac Mojave 10.14 how to add permanent environment variable

I have been scouring the internet, and cannot seem to find a solution to permanently adding an environment variable, specifically when my OS is macOS Mojave (10.14). It seems there are a lot of tutorials for past versions of the OS, but none for this one one. It also seems every old method has become outdated.

I want to add an environment variable ENV_VAR=12345 to my Mac, so that I can import it into a Python module using os.environ['ENV_VAR']

The most relevant tutorial I have found is this, but it doesn’t quite do the trick for me. A lot of others tell you how to temporarily add environment variables to bash, but I don’t think this is good enough. I want the addition to be there if you restart terminal.

Can you please either provide a short tutorial or point me to the correct/modern tutorial?

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?