New iMac coming

[T140V]

I will be ordering a new iMac.
I plan to transfer files via Time Machine.
At present my current iMac uses Open Core Legacy Patcher. Does this fact mean anything when I do the Time Machine transfer? Do I need to do anything before I transfer to the new iMac?

 

[Madonepro]

From what I remember about Open Core Legacy Patcher, yes there are some issues you might face transferring that way. When you use OPCP on an older Mac, it uses root patches to enable a later OS to work. Remnants of those might get carried over.
Others will chime along soon, with better knowledge/support. I personally would use this chance to have a clean install, Copying files across that you don't sync to the cloud, and using the cloud to sync things back. Obviously I don't know your use case, but I keep all my documents in the cloud, and back up my documents folder, onto a SSD, manually, about once a month, or when I've made some big additions. My media is also kept on a SSD, and I screenshot my applications folder, to remind me when reinstalling, what I had.

 

[T140V]

From what I remember about Open Core Legacy Patcher, yes there are some issues you might face transferring that way. When you use OPCP on an older Mac, it uses root patches to enable a later OS to work. Remnants of those might get carried over.
Others will chime along soon, with better knowledge/support. I personally would use this chance to have a clean install, Copying files across that you don't sync to the cloud, and using the cloud to sync things back. Obviously I don't know your use case, but I keep all my documents in the cloud, and back up my documents folder, onto a SSD, manually, about once a month, or when I've made some big additions. My media is also kept on a SSD, and I screenshot my applications folder, to remind me when reinstalling, what I had.

Thanks.
I don't use cloud service and my TM backups automatically go directly to my older external.
What if I were to choose a back up date before I installed OCLP? Would this allow me to get past any OCLP attached root patches?

Or, would I be safer down grading to my original Catalina. Running Monterey now. Is that possible? Or does TM never forget.