Problem with MacOS update 10.15.7 2020-001

Not into conspiracy theories, but believe you are correct. This about money, and another action by Apple to control you Apple devices and create a fatal disease for your older, reliable, durable, up grade able, Apple product. Apple wants my 2013 iMac in the trash bin and replaced with their new lease me Apple products. This is a dispute over who owns your Apple products.

Apple did make it clear that they won't support models as they go, meaning during updates under Catalina, they just did not say what machines, when.

Conspiracy theories have nothing to do with my comment, Apple wants to provide a high standard, its their market and many who dont adopt to newer devices miss out with out knowing it., I know I did as I had an iPad 2 and finally upgraded to a iPad Pro v2 and love it.

I have an external Samsung T5 and a T7 and both boot my MacBook Pro running 10.15.7, with security updates. But it’s a newer MacBook Pro. How old are the ones with the problem with external drives? I also have a 2011 MacBook Air on High Sierra that boots from external drives.

The iMac that I am having issues with is a 14,2 Model Name: iMac

Model Identifier: iMac14,2

Processor Name: Intel Core i5

Processor Speed: 3.4 GHz

Number of Processors: 1

Total Number of Cores: 4

L2 Cache (per Core): 256 KB

L3 Cache: 6 MB

Memory: 24 GB

Boot ROM Version: 429.0.0.0.0

SMC Version (system): 2.15f7

This is part of what finally after 1,5 days trying everything saved me, too.

1. Deleted the system part of my SSD (so not the "xyz-data" volume, just the system volume
2. Installed disconnected everything else from USB, only leaving this SSD plugged, as said to the 1st port of my iMac close to the thunderbolts (or called 4th or whatever you want)
3. Installation successful, so I re-connected other drives.
4. Then, after a next restart, problems seems to re-appear, booting from internal. Disconnected everything again, shut down
5. SMC Reset (unplug from power, in case of desktop machines)
6. NVRAM Reset (alt-cmd-p-r on immediately after powering on, hand keep them pressed together until your Mac really chimes and starts another time (yes, our fingers might hurt, get prepared)
7. To be safe and avoid one more time booting from internal, pressed alt after that, to call boot-manager
8. In Finder, reconnected drives again
9. What happened then to me: Only the first port with system SSD delivered the used speed. The other three port were ****** slow as a floppy disk (well, 20 MB/s, instead of 420-450 what I usually have on the other SSD or 15o on another 7200 HD)
10. Another restart, again, disconnecting all, and again resetting NVRAM
11. Now it's working, usb bus port speed seems to be fine again (checking now the last drive, my Time Machine Drive, which I can't check with Blackmagic disc-tool, cause it's read only)

What I avoid until any further update about this update:

• No Shut-Down, setting my Mac to sleep instead
• Ignoring this security update (well, I don't like to ignore, but anyway, I won't ride this ****-trip again

See another post with my system specs for more:

https://discussions.apple.com/thread/252193478

I keep saying the same thing over and over about the EFI issues and Apple, think EFI as a computer for your car and what garage can fix it other then the dealer if you lost your keys or need to re program a part you replaced.

Apple and most tech companies have been turning to this trend to prevent frauds while at the same time your files maybe trapped on a encrypted drive soldered unto a motherboard bricked from a Catalina update and only a Genius Bar can help you with this.....and within time and way they are operating its likely impossible, my solution was to bring the computer to a apple reseller, in a town far away from a Genius Bar...they usually tell you the dirt on Apple but dont get me wrong, ALL tech companies fallow this trend now. you won't be able to even swap parts of your computer with out problems, not even soldering a bigger drive, more ram is possible.

all components register IDs and this Chip2 set is another ball game.

Certain countries prohibit this and Genius bars do return Catalina bricked computers but reports from people show they swore parts are not the same, swapped, re programmed to work with the same motherboard., example one owner posted comments on a reddit thread accusing the Genius Bar of lying about her magsafe power supply claiming it was only supplying 5v when this was debunked online by a number of techs warning people that their machines can get bricked and which countries take action., unfortunately the US won't.

So unless you buy a new machine your at risk if you upgrade to Catalina.

Well since my iMac is 2013 vintage I suppose that makes it seven years old. But performance wise I would say it isn’t much slower than a new equivalent. Mine is an i5 at 2.9 ghz compared to i5 at 3.4ghz? I know there improvements in clock cycles and the like... But nothing mind blowing.

Thing is I only really use it for web, e-mail, music and photos rather than 3D or video work.

I will definitely not be trying to put that security update on now I have my iMac back where it was! And I might get a new iMac in the summer especially if they go M1.

It's def slower, I know it by experience, 'cause it was my 2013 iMac too, which suffered, and I can compare it with other iMacs around ;-) But anyway, it's a lovely workhorse, and I still love him, so don't have plans to replace this one before summer neither, same as you.

However, I think it's a good decision not to install this update for now, unless you do have too much spare time these days ;-) Let's wait, when Apple is going to fix it, as there are more and more having the same (or similar) issue.

Just did a quick look at the Cinebench scores for the iMac 2.9ghz (late 2013) vs the iMac 3.0ghz (current 6-core) and 2.9ghz scores 1167, 3.0ghx scores 2171 so nearly twice as quick and better GPU plus a few extra ports.

Sorry to sidetrack slightly :-) But going back to the topic in hand I am wondering now if my old SSD has failed, it's less that two years old so if it has I am surprised.

Hey ElkyOne, or anyone els on this thread, do we know when Apple will fix this? Has anyone notified them that there is a problem? I am growing weary of shutting down and unplugging all other external drives when I need to reboot. I want to eventually get a new iMac but I would sure rather get one with an M1 chip whenever they come out. Thanks!

Same for me, would like to wait for decent M1, for future investment ;-). Anyway, I read of several having send this to Apple, anyway not the worst to send this even more. I'll check it, please anyone else, too, if you find some time.

P.S: Haven't rebooted since then, trying to avoid. Just send my baby sleeping every night ;-)

Can anyone tell me who or where I can complain to regarding the fact that my Samsung T5 SSD drive is now no longer formatable since the security update broke it? I am sure that it isn't broke since I can see the drive in Disk Utility but it goes mad when trying to format it...

Update by now: I reported the issue on apple developer's section. Let's see what's going next. Please anyone else, do the same, to convince Apple to solve it, as we are not more young enough to do daily shelves-and desk-climbing tours to disconnect everything every day ;-)

Congress is responsible for allowing this, its a political issue.

In certain countries tech companies are obliged to repair anything they are responsible for damaging (not in the USA) thanks to lobbying.... its why France slapped fines etc,

but sometimes 200 million dollar fines are worth it...Apple makes more then 450 million an hour and 60 billion a year...the feedback link only reaches web masters....are you suggesting some ideas to improve the Apple website? Anything else goes to the trash bin,

Scores of companies (including Microsoft, how many computers and users have been impacted by Microsoft software bugs or anomalies) are protected by the End User License Agreement that goes with all the software that all users have to agree to before licensing the software and installing it. Maybe it's different in other countries.