Mavericks (10.9) to Catalina (10.15) via El Capitan (10.11)
I'd like some reassurance here.
I installed a new OSX 10.11 on a partition of the internal drive of my late 2013 iMac. The other partition has 10.9.5. Then I went the whole hog and installed OSX 10.15 on an external drive.
When I did a restart after several hours of setting up Catalina, it booted into Mavericks, and the Catalina drive was nowhere to be found. Not on the desktop, not in Disk Utility, not in the Sidebar, nowhere. I thought: Uh, oh!
This non-appearance is a problem for me because I want to switch between Mavericks and Catalina on a regular basis. However, when I shutdown and started up again several hours later, up came Catalina. This leads to a few questions:
Q1. If the non-appearance of Catalina happens again, is it possible to bring up the Catalina disk from within Mavericks?
Q2. Is there a key combination I can press during startup which will force all disks to appear?
Q3. I now want to turn my new Catalina into a disk image. Is that best done from within Catalina, or should I boot into Mavericks (or El Capitan) and do it from there?
Q4. I've been running Mavericks without a recovery partition ever since I bought my iMac in 2013 and removed it. Now that I've installed El Capitan and Catalina on other partitions, do those partitions now have Recovery Partitions?
The reason I ask is that I played around with Carbon Copy Cloner to clone my various OSXes, and it said that creating a Recovery Partition would be a good idea, but it never could.
Code for access to Apple
And other question on a different topic: when trying to log into Apple on Catalina, it said I needed a code – which then appeared on the screen. But, in days gone by when such a message appeared when setting up Mavericks or El Capitan, a message said the code has been sent to my other device (running Mavericks). I never ever saw the code, so I always had to opt for a phone call.
Q5. Does Mavericks not accept these codes?