Sonoma delays while booting

[Mr Bungle]

When my iMac is booting, the progress bar stops for about 25 seconds, then starts again. How can I fix it? I tried to reinstall Sonoma, with no success. I just go my new iMac M3 and transferred data from my old iMac late 2013. Should I reformat my SSD and reinstall the system and the data?

 

[fisherking]

call apple before you jump through too many hoops... (but also check to see what startup items are loading, & make sure all your apps are up-to-date).

 

[Fishrrman]

For what it's worth, I've noticed the same about Sonoma when booting.
That is... boot process "goes slowly" at first... but then... jumps ahead "towards the end".

My take:
It is, what it is.
So... I just live with it.

 

[kagharaht]

I skipped the migration from Time Machine to avoid that weird stuff that can happen when migrating from a 10 year old machine. I redownloaded my apps from App Store and just a couple that's not on there, and let iCloud repopulate all my data. I have syncing there in the cloud now. Anyway my new iMac M3 and mine doesn't stop for that long. Perhaps a half a second or less then it shoots across and its done. I'm still shocked on how fast these things boot! I should do a timer because I feel like it boots in 5 seconds or so. lol

 

[Ben J.]

I'm still shocked on how fast these things boot! I should do a timer because I feel like it boots in 5 seconds or so. lol

Yes. It's pretty impressive. The mini in my signature boots in just under ten seconds, from boot-chime to the desktop showing up. I hardly see the progress bar. (I have it on auto-login.) My previous M2 mini; just over ten sec. My original M1 mini; about 15 sec.

@OP; I would take it back if I were you. I'd be very concerned if I saw this behaviour in a brand new mac.

 

[fisherking]

Yes. It's pretty impressive. The mini in my signature boots in just under ten seconds, from boot-chime to the desktop showing up. I hardly see the progress bar. (I have it on auto-login.) My previous M2 mini; just over ten sec. My original M1 mini; about 15 sec.

@OP; I would take it back if I were you. I'd be very concerned if I saw this behaviour in a brand new mac.

or start with a call to apple. likely something in the migration is causing an issue...

 

[HDFan]

You can also check the system log, remove all login programs, extensions etc. to get some ideas. Does the same thing happen in Safe Mode?

 

[Mr Bungle]

Yep, the same thing happened is Safe Mode. I called Apple, and they didn't suggest anything that I hadn't tried. I finally erased the SSD and reinstalled Sonoma. Got my data back from iCloud and Dropbox. Problem solved! kagharaht did the right thing: it's better not to migrate from a 10 years machine.