mojave install macbook pro slow and no internet

Same problem here. I'm pretty bummed and think Apple quality has slipped considerably.

I upgraded my iMac to Mojave and it completely screwed everything up. The WiFi icon now has an X in it and says I have no WiFi installed. And the computer is unusably slow. Everything worked fine before the upgrade.

Here’s what I tried to fix it. Nothing worked.

- Rebooted

- Reset SMC and PRAM/NVRAM

- Rebooted in recovery mode and performed disk first aid, then reinstalled OS

- Went into System Prefs and tried to change network settings. Computer runs hopelessly slow when I do this and doesn’t allow me to make changes.

- Rebooted in Safe Mode, which took almost an hour

- Created a new user to see if that would work better.

None of these actions helped. But when I reboot in recovery mode, the WiFi logo in upper left corner shows its working so I know it’s not a WiFi hardware issue. But when I boot normally, the WiFi status icon shows an X and says WiFi isn’t installed.

Thanks for your suggestion, but I've spent enough time on this. I don't have any kernel extensions, and I reverted back to High Sierra (took a day of my life so I'm quite fed up already and definitely don't plan on spending more time on Mojave for now thank you).

Glad you found out of it, but I don't have Little Snitch or anything like it, and I have read about others who neither have it. But of course, there might be something other causing a similar problem, but I didn't receive any error messages so I am in the blue as to what it could be, so I will continue to sit this one out and wait until they release and update. Hopefully that will work as it should or it will at least give us a hint as to what causes the problem.

Well, I am not desperate:) High Sierra works fine so I am OK with it. I have a 2017 model 27" iMac but it doesn't have a SSD-disk, but I could have made a partition on that to do as you suggested, but after two botched attempts to install Mojave, I had enough. I guess it had to happen once, after all these years (since 1998) without much hassle, if any at all.
I'm afraid we are but a tiny minority but I hope people at Apple are aware of it anyhow.
And no, I didn't check Activity Monitor, but I think notcloudy are onto something up here above. Perhaps the system is conversing everything to the new file format? But if that is the case, it would have been nice with some kind of info about it, methinks.
I am missing the little info we used to get earlier when installing and upgrading. At least something to look at 🙂

Perhaps you are on to something here. Yes, Apple introduced a new file format recently - AFPS instead of HFS+ or MacOS Extended. I had expected some conversion when I upgraded to High Sierra but it didn't happen and the harddrive on my new iMac is still MacOS Extended. I was a bit confused because of this, but there was no clear information as to what one would need to do, if anything. But if that is the case, the least one would expect is some useful info about it. Perhaps before the installation starts. Something.

On my MBP mid2014 ( specifications in the signature) I have serious problems with Imovie .... sluggish absurd, crashes, what ever happened with previous versions .... I also have problems with the flickering of the dedicated video card (nvidia gt 750 M) .... unfortunately I think it was born bad this Mojave, hoping not to end Ios 11

Now when I wanted to check this out as I am back home again, I just get this when I click the link:

Access to this place or content is restricted. If you think this is a mistake, please contact your administrator or the person who directed you here.

Can't access the link. Says Unauthorized.

But anyway before I could do anything, its back up to speed again.

Probably spotlight or something was running in stealth mode. Had to bare with the sluggishness for a few days and its back up to speed.

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.

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!

The iMacs with Fusion drives have problems with Mojave. I think specifically the 3TB machine. Google for more info. If it has a factory SSD you should have no trouble.

Apple support couldn’t help. So now I have to take my iMac to a store.

Thanks Wilfred.. I honestly think it's a Kernel error the size of Australia! I have seen them happening and in my experience it is the same effects! thanks very much ..

Obscure as it seems, I heard that Mojave may be objecting to apostrophes in disk names. Anyway, I hope you all have good backup.

Sorry, I was a bit confused here - my iMac has a so-called Fusion Drive and as such, it has a SSD-disk as well, but it is invisible to the normal user and cannot be partitioned.