emeu1 wrote:
Hello,
on my MacBook, System Preferences tells me that the size of Catalina download in 8,09 Gb whereas App Store tells me that the Catalina download is 4,9 Gb.
That's quite a difference.
Just curious, is this an error and which of the figures is correct?
Best regards,
emeu1
What is the difference in the discrepancy— it goes with the complex territory o computers and Upgrade being specific to your machine. What difference does it make..the screen is in error— you can always send Apple Feedback http://www.apple.com/feedback and ask for some explanation.
The original download was 8.09GB, then the re-release was 8.12GB— all this may still vary depend on your exact machine.
Ignore 4.9GB

More importantly—
* If upgrading from OS X El Capitan 10.11.5 or later, macOS Catalina
requires 12.5GB of available storage to upgrade. If upgrading from an
earlier release, macOS Catalina requires up to 18.5GB of available
storage.