Odd Bootup Behavior

nmeed

macrumors 6502
Original poster
Dec 1, 2014
303
67
I updated to Mojave yesterday and I noticed that during bootup, the screen goes blank midway, then a while later, the progress bar shows back up and then I enter my desktop. Has anyone noticed this behavior? Also, overall it seems a bit slower. It was running like a demon on High Sierra. It’s definitely not as smooth. Are there any suggestions as to what I can try to remedy this? I tried to reset the SMC (seems in Mojave the power indicator doesn’t blink orange anymore?) and NVRAM.
 

Piankhy

macrumors newbie
Sep 25, 2018
1
1
I just had the same problem with my installation as well. Macbook Pro mid-2012. I updated Mojave from High Sierra. After installation, the computer has started again on the login screen. I typed the normal password, the the bar moves until the middle, then black screen for some seconds, and it gets into the desktop. I supposed it was a problem because I am using a pre-retina computer, but it is not that the issue.

As nmeed above, may I ask for a possible the solution for it? SMC does not help. the pattern also happens in Safe mode, which is also slow to start anyway. Having visual problems, the dark mode helps, but the slow start is something bothering me of course.
 
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friednoodles

Suspended
Feb 4, 2014
601
829
I think I might have the same issue, except mine also shows the Apple logo above a progress bar for a few seconds after logging in. i.e. enter password and log in and it shows the progress bar as usual, then the screen goes black and it shows a white Apple logo and white progress bar few a few seconds, then the desktop appears.

It seems like this thread is describing the same issue:

https://discussions.apple.com/thread/8552067

I did a reinstall of Mojave and restored a Time Machine backup and the same behaviour remains.
 
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Viking23

macrumors member
Mar 8, 2012
53
0
Scotland, UK
I have just finished updating a late 2013 iMac with Fusion drive and two MBPro laptops both early 2015 without problem, however, I also have the above issue.
 

Khaleal

macrumors regular
Aug 24, 2013
185
74
I've got the same issue. Mojave clean install (15" MacBook Pro 2014)
Edit: Filevault is off
 
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Lunder89

macrumors 6502
Oct 16, 2014
393
128
Denmark
I just had the same problem with my installation as well. Macbook Pro mid-2012. I updated Mojave from High Sierra. After installation, the computer has started again on the login screen. I typed the normal password, the the bar moves until the middle, then black screen for some seconds, and it gets into the desktop. I supposed it was a problem because I am using a pre-retina computer, but it is not that the issue.

As nmeed above, may I ask for a possible the solution for it? SMC does not help. the pattern also happens in Safe mode, which is also slow to start anyway. Having visual problems, the dark mode helps, but the slow start is something bothering me of course.
Based on your description of the problem, it sounds like you have FileVault turned on?
 

StellarVixen

macrumors 68020
Mar 1, 2018
2,237
3,684
Earth
For me, it is as following: it lights up with boot chime, Apple logo and progress bar, as normal. Then, there is brief black screen for few seconds, then it shows the screen with progress bar almost finished for a few seconds, and that is it!

So, you can say that only difference from HS for me is a brief black screen. Does not bother me.
 
Jul 4, 2015
4,488
2,548
Paris
If you have File Vault enabled the first part of boot is accessing and unlocking the drive.

If you have a T1 or T2 chip, the bridge OS boots before macOS.
 

mattburley7

macrumors 68040
Oct 13, 2011
3,235
618
i wonder if this is fixed in the 10.14.1 beta?

i wont be able to find out till public release of that version. not using a beta.
 

Fishrrman

macrumors Core
Feb 20, 2009
19,449
6,747
OP wrote:
"I updated to Mojave yesterday and I noticed that during bootup, the screen goes blank midway, then a while later, the progress bar shows back up and then I enter my desktop."

I've seen similar behavior here (2012 Mac Mini), but I've come to the conclusion that the "momentary blacking out" has something to do with the graphics loading/initializing.

I notice this almost every time I "switch boot" back-and-forth between my regular working OS (Low Sierra) and High Sierra or the new Mojave.

It always "comes back", so I accept it as something to do with the peculiarities of how the graphics load up, and don't worry about it.

Have you tried a couple of power-downs/reboots to see if it persists?
 
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Wally©

macrumors member
May 2, 2015
99
18
Belgium
For me, it is as following: it lights up with boot chime, Apple logo and progress bar, as normal. Then, there is brief black screen for few seconds, then it shows the screen with progress bar almost finished for a few seconds, and that is it!

So, you can say that only difference from HS for me is a brief black screen. Does not bother me.
Same here...
But the total boot-up time has increased drastically...
Before...on Yosemite...the Mac (late 2013 was up and ready to go at the exact same time the HD in the Time Capsule
stops spinning...Now there's an additional +/- 40 seconds...
 

ISKOTB

macrumors 6502a
Aug 6, 2011
647
97
🇺🇸
I got this tip from another post:

I found of going to preferences, unlocking, reassigning the hd as startup, and restarting solved the slow boot problem for me.
 

nmeed

macrumors 6502
Original poster
Dec 1, 2014
303
67
I got this tip from another post:

I found of going to preferences, unlocking, reassigning the hd as startup, and restarting solved the slow boot problem for me.
How to reassign it?

[doublepost=1537994015][/doublepost]
OP wrote:
"I updated to Mojave yesterday and I noticed that during bootup, the screen goes blank midway, then a while later, the progress bar shows back up and then I enter my desktop."

I've seen similar behavior here (2012 Mac Mini), but I've come to the conclusion that the "momentary blacking out" has something to do with the graphics loading/initializing.

I notice this almost every time I "switch boot" back-and-forth between my regular working OS (Low Sierra) and High Sierra or the new Mojave.

It always "comes back", so I accept it as something to do with the peculiarities of how the graphics load up, and don't worry about it.

Have you tried a couple of power-downs/reboots to see if it persists?

Yes, multiple... it's still there. I'm pretty sure it's something inherent with Mojave one way or another. Hopefully the new build will fix it.
 

Coltaine

macrumors regular
Jan 7, 2012
162
101
How to reassign it?

[doublepost=1537994015][/doublepost]

I think, what he means is go to system preferences, startup disk, unlock it by entering your password, then click on your Macintosh HD and then click reboot.

I have no idea why, but this solved the slow boot up issue for me, too.
Even though the black screen with the white Apple logo and the white status bar still appears.
Filve Vault enabled on my system.
 

nmeed

macrumors 6502
Original poster
Dec 1, 2014
303
67
I think, what he means is go to system preferences, startup disk, unlock it by entering your password, then click on your Macintosh HD and then click reboot.

I have no idea why, but this solved the slow boot up issue for me, too.
Even though the black screen with the white Apple logo and the white status bar still appears.
Filve Vault enabled on my system.
I couldn't tell a difference to be honest but thanks!
 

KoolAid-Drink

macrumors 65816
Sep 18, 2013
1,424
406
USA
Same here - encrypted APFS startup partition. I’m asked to type in my password then the progress bar moves, black screen comes and covers the entire screen for like 2 seconds, then I’m at my desktop. rMBP 2015. Definitely an OS system-wide bug, seeing that many others are having this same issue.

Edit: didn’t pay attention thoroughly. Just did again, and it’s actually about 5 seconds of blackout, then the apple logo and progress bar again, for about 2 seconds, then the desktop. Annoying bug.
 
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jtshs256

macrumors newbie
Jul 20, 2012
2
1
Things got fixed in 10.14.1 PB1 (18b45d).
Everything works as expected with FileVault off.
With FileVault on, however, you will always get the default Mojave picture as login background other than the picture that was set as your desktop. Hope that they can fix that as well.
 
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