mojave install macbook pro slow and no internet

Amazing! It worked!!!

THANK YOU. Too bad Apple Support couldn't post this. Seems like a simple solution to a common problem.

Glad that it worked well! A pity I couldn’t find again the original post so one could honour he who came across this solution. Anyway, I know the feeling 🙂

Wilfred, Thank you for your response. I don't have that file on my fusion drive iMac. I might go back to High Sierra. I have to research how to go about this. Best.

I had exactly the same issue when upgraded my MacBook Pro 15" mid-2014. First, it took quite long to upgrade. Second, my Mac became very unresponsive (every click will take a minute to respond), third there was no internet even though the wifi was on and connected and fourth the computer was overheating and the fans were not revving up.

In my case it turned out it was the version of Little Snitch I had. It was not compatible and for some reason the process will stay forever with 100% CPU usage. There was also a message that something is not compatible with the current kernel. Once I was able to kill that process and download the very latest version of Little Snitch (that apparently had been updated to support Mojave) all was running fine again. No overheating issues and the computer is quite responsive again. Internet connection works fine as well. My only issue at the moment is the when booting, it stays a little longer on the apple loge with the progress bar. it is just like a frozen for a while at two thirds of the progress bar. Then it continues and all is working fine.

My guess is that you may have a resident application that may not be fully compatible with Mojave...

I think the following might be of help. I came across it on these forums after I had tried to install Mojave three times with no success and the reason for it might be this file which has followed our upgrades over the years. Mine dated back to 2005. Anyway, I followed the instructions as described and could install Mojave without any problems and my new iMac is now snappier than it was with High Sierra.

A. If you can log in (even if slow), or you're still on High Sierra, and have not yet upgraded, follow these instructions:

1. Start the terminal app from Applications/Utilities

2. Check if the file exists, by typing

ls -l /etc/sysctl.conf

If this returns a result like the following, then the file exists. If it does not, then your issues are caused by something else

-rw-r--r-- 1 root wheel 136 24 Nov 2013 /etc/sysctl.conf

3. Simply rename the file by typing in: sudo mv /etc/sysctl.conf /etc/sysctl.conf.bak

(You’ll be prompted for your password)

4. Restart your computer, and you should be all set, or if you've rolled back to High Sierra, you should be good to attempt the upgrade again.