We bought a pound of lobster meat from the local fishmonger for $68 and made lobster rolls for dinner. Some local strawberries and a nice wine rounded it out. We saved at least 50% not buying them pre-made at the clam shack.
My Apple mail kept opening for no reason so I just switched to MailMate. It's a simple IMAP interface with a ton of backend options and hidden command line settings for the techies, a heavy-lifter email app. It's a one time payment and is as powerful or simple as you need it to be. Originally written around 2010 and still updated, it's a very mature program.
It's called Mac OS and is actually a version of UNIX heavily modified by Apple. Linux is basically a copy of UNIX. Mac OS does not have a registry. Mac OS and Windows couldn't be more different. OSX (the X stands for 10) was the versions of Mac OS that had 10 as the major version number that ended with Catalina.