macOS Monterey takes 25+ minutes to boot

The Samsung EVO 860 is compatible and shouldn't cause any issues. The models proven not compatible (due to a certain controller chip used) are the 950, 960, and 970. My 2015 MBP, now with a WD SN750 fitted, boots to the desktop in under 15 seconds.

I use Malwarebytes and have the slow boot issue. Mine is about 4 minutes and occurs intermittently.

I have recently noticed that this issue (4 - 5 minute delayed start ups) has resolved without any interventions.

I have a 2019 mac mini. I wonder is a recent update resolved this issue.

I am currently operating my late 2013 MacPro on an external NVMe drive via USB3 port and it boots as expected on USB3 port and operates fine. Thus, t

slowness on external drive is not applicable to all Macs on Monterey.

Yepp, as I already wrote in this place a few days ago.

Have same problem with iMac 2019, 128 GB RAM NWMe-SSD internal with Monterey.

Although there are "only" 5 minutes for iMac to boot it's something that's not acceptable at all!

Yes agree, it’s really shoddy from Apple. Monterey was obviously not ready for release. Think the M1 advances are great, but the onboard storage & memory is a bad move. Can see myself building a new PC & moving bank to Windows at this rate! 😬

Same problem here. Used to have Big Sur running from my external SSD (500GB) with good speed. Internal drive is HDD (slow as ****). iMac late 2015 i5 8gb Intel Iris Pro Graphics.

Startup time is now 5min +

Did the usual things (pvram reset etc). Nothing changed. AJA Speed is now down to 7MB/sec!!! Had 410MB/sec write speed (with 4GB file size).

HELP Apple!

I have the same issue. I have an external Samsung x5 SSD 1 TB. My iMac 2017 27" 64 GB i5, used to boot in less than 30 seconds using macOS Big Sur, unless I upgraded / even clean install of macOS Monterey on the SSD, but now I have insane boot of more than 3 minutes. Apple have to find a solution and resolve this bug ASAP. We can't tolerate such a big latency of startup.

I have no issue have mac os Monterey installed on a modified lacie thunderbolt enclosure with a SSD in it boot time is the same as internal drive here on my end i notice no difference. This is on a late 2015 intel Imac.

I leave my late 2015 Imac on 24x7 it goes to sleep , on the occasion i do shut down or reboot i have not noticed a difference in boot times and i'm running a modified LaCie thunderbolt drive with a SSD in it.

This is Apple's way of making up for those that were fortunate enough to avoid the same issue after updating to Big Sur w/ a Fusion Drive . 😉🙄

My iMac Retina 5K, 27-inch, 2019 had same issue last year after Big Sur update from Catalina. After that, I avoided restart.

I'm still considering upgrading it to SSD, but really waiting until the new 27"+ "M" series iMac is released.

It's a good thing it doesn't affect all Mac users, otherwise Apple would have to do something about it. And what they should have done is offered to upgrade (FOC) the Fusion Drive to SDD for those affected. They said it was compatible with my iMac. I shouldn't have to downgrade macOS or upgrade the Fusion Drive.

There seem not to be a home made solution at time being. My iMac (2019), 128GB RAM and two internal SSDs (1x NVMe 2TB, 1x 2,5' SSD 2TB), worked fine for 1-2 weeks after Monterey installation. Then bang without any warning or anything I could lead back to, iMac started to boot about 5 minutes long, instead of the previous 20-30 seconds. At least one thing ist resistent; boot time is almost every time the same.

I have been instructed by many Apple users to NOT upgrade to Monterey. Apparently the OS is super bad with many bugs and needs many fixes.

I will continue to use Big Sur until I know Monterey is safe to install. I don't need slow! Using an iMAC is slow enough.

I think my days of using an Apple OS are numbered. If this is the best software engineering Apple can do, I am out of here!

I had a colleague allow me to use his Windows PC with latest OS on it. It will burn smoke around Apple. No contest.

I am having the same problem. Right now my MBP '17 still it's freeing up to me to use. The desktop shows, but Sophos is downloading new signatures and OneDrive is starting. I been seeing the rotating beach ball for the last 30 minutes. (Typing on my Windows Laptop). Work great on Monterey for about a month. Now it is giving me issues. Had the same thing happen when I upgraded to Big Sur. (Long Boot Time). When I had the Big Sur issues, I wiped the SSD, did a clean install of Catalina. If this keeps up much longer with Monterey, I will need to back down to Catalina. I hope Apple is monitoring this thread.