I've made a bootable thumb drive for Sierra... any sense in keeping the original installer on my mac?
Thanks.
My general policy -- whether it is an OS installer, or any other app for that matter -- has always been to keep the latest installer, as well as the version just before it. That way, if you run into any serious problems -- such as bugs, incompatibilities, instability, conflicts with apps that you really need to use, etc. -- you always have the option to return to your former state.
As a matter of fact, even during the past few days, I have read several accounts on this forum where folks have complained that Sierra hosed their system, and yet they don't have a backup of their former system, or even the installer for it, because in their haste they deleted it.
Operating in such a fashion, in my view, is foolishness. It is playing with fire.
Hard drives are so big these days, that keeping installers -- even if they are 4-6 GB in size -- is not a problem.
Also, if you are on an older machine which uses an older OS, you never know when Apple may remove something that you really need from their servers, from the App Store, etc.; so it pays to have that installer local on your own hard drive.
Another instance where it is good to keep at least the latest OS installer in your "Applications" folder is if you use mas-cli, instead of the GUI version of the App Store. In such a case, if you remove the installer from your "Applications" folder, then mas-cli will no longer list that OS installer when you use the "mas list" command in the Terminal.
So as you can see, contrary to what some people like to claim, there are some very good reasons for keeping around installers.
One last question: What would you do if you found yourself in a serious fix where you suddenly needed to reinstall your OS, but your Internet connection was down for an extended period?