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Serious issues with Mojave. Slow and no WiFi

seamuskrat

seamuskrat

macrumors 6502a
Original poster
Feb 17, 2003
898
19
New Jersey USA
i have a 2015 late iMac 5K I stalled Mojave’s today and all seemingly went well.
Now it’s unusable. The machine takes minutes to boot and entering the password take 3 minutes. Beach ball spinning after every letter. When it finally loads the Mojave background is visible and I cannot get to anything. It’s soooo unresponsive.
Add8ng to this is the fact the WiFi and Ethernet are hardware unavailable. They work fine as I can boot via another disk and they work fine.

I need a way to improve the speed so I can trouble shoot in less than a day and a half and get internet functional

Anyone else experience similar issues?
 
If you have little snitch, that's what's blocking your network - need to download the new version on another machine (or via safe mode) and upgrade.
 
Assuming you did the hardware test and everything is ok, and assuming you have a recent backup, I would do a clean install of Mojave and see how it works under those conditions. That will quickly allow you to see if maybe it's something that came over from your other software, or whether it's a machine issue that's only showing with Mojave (admittedly seems incredibly unlikely).

If it all works great on a clean backup, restore your old backup and upgrade again. If that is messed up, go back to a clean install and manually restore your stuff.

Perhaps list the apps you had installed too, maybe someone will have some specific points. Like MallardDuck, above.
 
Actually, a lot of things... A LOT has changed... Upgrading worked fairly good for me, but a clean install of EVERYTHING (no migrating apps/settings) really kicked mine into high gear. I’m booting from a 3300 MB/s NVMe, and a clean install was a dramatic improvement on MY machine. It’s a little work, but worth the effort if you are having issues otherwise. JMHO...
 
OP:

Can you do a safe boot?
(hold down shift key at startup)

What happens when you do this?
 
BTW, I also had this exact same problem. I restored High Sierra from a backup I did minutes before the Mojave installation.

Now, I don't know how this is possible, but when I restored High Sierra via Time Machine thru the recovery partition, my Photos library got messed up. If I try to open Photos, I get a message saying that my library was created with a newer version of Photos and I need to upgrade to a new version. Ughgh. I'll try a clean install when I get a chance.
 
seamuskrat said:
i have a 2015 late iMac 5K I stalled Mojave’s today and all seemingly went well.
Now it’s unusable. The machine takes minutes to boot and entering the password take 3 minutes. Beach ball spinning after every letter. When it finally loads the Mojave background is visible and I cannot get to anything. It’s soooo unresponsive.
Add8ng to this is the fact the WiFi and Ethernet are hardware unavailable. They work fine as I can boot via another disk and they work fine.

I need a way to improve the speed so I can trouble shoot in less than a day and a half and get internet functional

Anyone else experience similar issues?
Click to expand...

did you find a fix, mine doesn't seem to be as slow as yours but its close
 
mattley.ski said:
did you find a fix, mine doesn't seem to be as slow as yours but its close
Click to expand...


Sort of.
I SUSPECT the issue was complex. FileVault definitely was messing with things. As was Little Snitch.

Ultimately after a dozen failed attempts to upgrade in various ways I made a bootable instal usb drive and wiped the drive.

That instal was fine. When I tried to import from time machine or super duper backups I had issues.

After years of upgrades I bit the bullet and just started fresh. Lost some lesser used software I lost the keys to but I am back in business with a fresh start.

Super annoying. Definitely the WORST upgrade ever. I’ve been using Macd since the 128k I. 1984.
 
seamuskrat said:
Sort of.
I SUSPECT the issue was complex. FileVault definitely was messing with things. As was Little Snitch.

Ultimately after a dozen failed attempts to upgrade in various ways I made a bootable instal usb drive and wiped the drive.

That instal was fine. When I tried to import from time machine or super duper backups I had issues.

After years of upgrades I bit the bullet and just started fresh. Lost some lesser used software I lost the keys to but I am back in business with a fresh start.

Super annoying. Definitely the WORST upgrade ever. I’ve been using Macd since the 128k I. 1984.
Click to expand...
yeah im thinking of backing up photos and music, and a few documents and starting fresh with everything
 
Sorry if I'm a bit late with this response, but I just got (and fixed) this issue today) ;)

This is a solution that I found in this thread (same one that @dauber mentioned):

https://discussions.apple.com/thread/8558304

After I updated my MacBook Pro 15" from 2015 to Mojave (macOS 10.14), I suddently couldn't use the wifi. It said that I didn't have any wifi hardware installed.
In addition to not having an intenet connection, the machine also became ridiculously slow and unresponsive. I then used one of my other computers to search for
answers, only to find that a lot of people were struggling with the same issues. The following "fix" told me to use a sudo command to locate the file, but this
didn't find it for me, so I did the following that did work (although the sudo command may work for others):


/Volumes/Macintosh HD, got to /etc/ and rename/delete the sysctl.conf file, then reboot!

The "etc" is a hidden folder that lies directly under "Macintosh HD", but you can easily find it by selecting "Go to folder" in the finder menu,
and then search for "/etc/". In the "etc" folder you may (if you are having this problem) find the file "sysctl.conf". You must either delete or
rename this file (I deleted it). Then the final step is to restart the Mac! ... And hopefully this solves your problem (like it did for me)! ;)
 
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