That sounds like a typical answer from Apple that may not and often does not even work, especially when one is trying to install a much earlier OS such as Mavericks.
Getting an earlier, older Mac OS version installed has become a real PITA and for no real reason. And often, unfortunately, their web page tutorials of how to do not always work.
Maybe just give Apple Canada a call and see if there's a decent human tech that can help at the other end.
I, frankly, find the instructions quite clear! I have created USB installers ever since Mavericks - they have saved my clients and I countless hours not having to download installer files for each and every machine. Indeed, getting hold of early versions currently can be problematic I agree, which is why I have made multiple copies and treat them like gold!!
"not all those who wander are lost….." j.r.r. tolkien
I ended up using a time machine backup from a Mac Mini I have and restored from that. I upgraded to High Sierra which is the newest OS it can take. I will be trying to go the usual route this time around for a clean install.
I tried a few different things with no luck. Bootable USB stick did not work (showed up fine on a MacBook Pro), I put the iMac into target disk mode and connected via thunderbolt to MacBook Pro (2015 model I believe, iMac is 2011). It showed up but the option to install to the iMac was greyed out saying it could not be done because it was in target disk mode.
Never had this much trouble trying to do a clean install before!
Yikes Target disk has two purposes, allowing an easy transfer of files to another computer and an easy install to the target computer. Did you do a 'get info' on the target disk and make sure permissions were disabled?
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Social Distancing is an Oxymoron. The correct term is Social Demonization or Social Repression. Bandits, thieves and politically correct thugs hide behind masks.
Anybody knows where to download Catalina install dmg instead of the install app?
you can get the dmg in the install app you download from the App store. Can't remember the terminology as it has been years since doing this but you are basically viewing the contents of the install app and there should be a .dmg file in there you can extract.
“If you are neutral in situations of injustice, you have chosen the side of the oppressor. If an elephant has its foot on the tail of a mouse and you say that you are neutral, the mouse will not appreciate your neutrality.” Bishop Desmond Tutu
I'm going to create a bootable Big Sur flash drive for a clean install. I guess there's plenty of instructions on how to do that. Did I read above where someone stated Sierra is the lat download that one can do that with? I created a bootable flash drive for Catalina last year.