How can I downgrade from macOS Sonoma?

You will need to search for detailed advice outside these discussions.

In brief, you will need to have installation and booting files on an external drive, erase the current Sonoma drive and install the old mac OS. These are not easy things to do, especially with the latest Macs.

In any case, make sure you have a Time Machine, or similar, backup of your current system in case things go wrong.

Just for the record, I recently did a similar thing with a 2015 Retina Macbook that was running Mojave but had some annoying corruption resulting in frequent pop-up messages ("suggestd" error or something). I decided to do a clean install of Mojave. This was tedious but worked. Unfortunately it did not eliminate the error message!

How do I downgrade my Mac OS X operating … - Apple Community

Downgrading is possible to a limited extent. Library files of Photos and Music once upgraded, can't be downgraded. But the original photos and music files can have their libraries, favorites, albums, and smart folders rebuilt from scratch under the older operating system. My tip above explains the many possible ways of downgrading. You can create a separate partition with the oldest operating system that came with your Mac using the Internet Recovery routine, and upgrade that with Apple's available upgrades on this page:

How to download and install macOS - Apple Support

Note, those installers will only work on systems that are older than the installer.

Your question has already been answered earlier in the thread. Here is the answer again:

How do I downgrade my Mac OS X operating … - Apple Community

If you have any questions, please start a new topic thread indicating what part of the article you don't understand or doesn't make sense for your situation.

LucyMorales wrote:

I upgraded to macOS Sonoma and my QB 2019 is crashing as soon as I try to enter into any account. I need to downgrade my MACBOOK to its previous version as soon as possible.

Sorry downgrading isn't supported by Apple.

Report the issue to QB support.

Have had problems with printing any forms of any kind with IOS Sonoma with Quickbooks Online. After 4 days of multiple phone calls to Intuit, I have finally found a way to print all QBO reports, Invoices, Statements, etc...

Once I changed the template to Airy New the printing problem went away. The reports/invoices do come out with a slightly different look but overall are just fine.

If you use the desktop version of Quickbooks, maybe this change in the template style can help you as well.

Good luck and I look forward to this being resolved once and for all.

-Loura

https://quickbooks.intuit.com/learn-support/en-us/account-management/cannot-print-with-qbo-after-upgrade-to-sonoma/00/1326873

[Edited by Moderator]

You can downgrade but it's not really recommended. You would be better off upgrading to QB 2023.

Hi all, I would like to downgrade from iMacOS Sonoma to a previous OS