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mojave install macbook pro slow and no internet

I went to the app store to download and install macOS mojave. Since the install my Macbook Pro a) runs extremily slow and b) I have a message that there is no wifi hardware installed. I have tried re-installing macOS mojave using command-r upon boot-up but after the re-install the system is still exhibiting the the above problems.


Please advise as to what I can do.


-- rob

MacBook Pro (Retina, 15-inch, Mid 2015), macOS Mojave (10.14)

Posted on Sep 24, 2018 6:43 PM

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Posted on Sep 25, 2018 10:29 AM

I ran across the same problem and I had to reinstall High Sierra from a backup through Time Machine. If you have backed it up to an external disk, you should be able to do so after you have started with command-r, but go to the install from backup-option then.
I think I will wait until Apple releases an update or if someone smart enough can tell us what the problem is and how to avoid it.
I am on a 2017 iMac, 27 " so the hardware should be good enough, at least.

51 replies

Nov 27, 2018 7:17 PM in response to lec0rsaire

I have an iMAC 27" 3.4GHz Quad-core Intel Core i5, 16GB RAM, 3TB fusion drive with 128GB SSD purchased in 2015. So I am one of those unlucky Fusion Drive owners. The iMac ran like a champ in High Sierra. I've owned only Macs since the 1990s and this is the worst upgrade experience I've ever had. Many apps are terribly slow or freeze altogether. I've never seen the ball spin so much. It does this regardless of the browser being Chrome, Firefox, or Safari. MS Word has been super slow to launch or save. Even iTunes and iPhoto have the ball spinning like crazy. I am not looking forward to calling tech support because I don't have a half a day to burn on this. I've read that Mojave can damage some hard drives due to a new filing system. Hopefully I will avoid that. I hope that future Mojave updates will make my computer run more efficiently. I agree with other posters that Apple does not need a software overhaul every year. Let's slow things down and make sure Fusion Drives and other issues are addressed before a major rollout.

Nov 27, 2018 7:51 PM in response to DogTown5

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.

Nov 29, 2018 10:29 AM in response to Wilfred Hildonen

Many thanks for this post. I have a mid 2015 MacBook Pro and Mojave was a total mess when I installed it in October. Super slow, apps would not open forever and the ball just kept spinning. I tried again last week with the same result. However, I used your post and tried again. Perfect results as I have expected in the past. I am writing right now with Mojave. Thanks again!

mojave install macbook pro slow and no internet

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