Precautions for updating FCPX from 10.4.5 to 10.4.8 that needs also updating my MacOS Mojave from 10.4.1 to 10.14.6

As a little addition to what Ian said:

Since you won’t be able to download older versions, it may be a good idea to zip the 10.4.1 version, just in case.

Also, it is preferable, especially with such a large gap in Mojave versions, to download and install the 10.14.6 COMBO Update.

There should be no problem but as with everything in life, things can happen.

So it makes good sense to backup your Mac with TimeMachine etc.

The chances are overwhelmingly that nothing bad will occur but it's always best to be over-cautious.

There was a huge performance hit from 10.4.6 to 10.4.7 and several issues as well, some of which were fixed in 10.4.8, but the performance still suffers.

If you didn't buy these plugins from FxFactory (or MotionVFX), you can try to backdate them here:

https://fcpxtemplates.com/motion-template-backdater/

No! Upload the the actual Motion file (looks like Logo Reveal 044). The converter page will only accept .motn, .moti, .moef and .motr files.

I'm a little concerned by the appearance of the Motion icon on the template file — it looks like it is older than the current icon used.

Right click on the template file and Get Info. Check the Modified Date. Check it against this list:

https://fcpxtemplates.com/fcpx-motion-compatibility/

Please read the Instructions & Notes section before proceeding.

I've had very good success using this and when a user requests a backdated copy of my templates, I use this same tool.

Simply replace the original Motion template file. All the script is doing is changing a couple of lines of the XML in the template file. You should replace the original with the file with the **exact same name** as the uploaded file. If you've backed up the original, then you can simply drag and drop the converted file in the Motion template folder then select to Replace the original from the dialog popup.

The file name should not be changed. You should move the original out of the template folder and move the modified file into its place. You can simply rename the modified file to the exact same name as the original, there's no need to go through the converter a second time. Motion template files are not really anything special -- they're just XML.

If you already moved a copy of the original out of the Template folder, you can simply drag and drop the converted file onto the Template folder and select Replace from the dialog box when the Finder asks you if you want to replace it.

When you get the converted download, it frequently shows the extension for the file (.motn, .moti, etc...). You can turn that back off by using Get Info in the Finder and turning on "Hide Extension".