URGENT - Install Catalina on external SSD drive: can I use it on another Mac?

[Jedi82]

Hy guys. I just install from my MacBook Pro macOS Catalina on an external SSD drive and all went fine. I then decided to boot from this external SSD the system BUT on my older Macbook (not the pro) but when I chose the external disc the Mac show me the prohibition sign and I can't enter my system.

Is it normal? For what I know, I can install and use macOS from my external SSD on all the Mac or I'm wrong?

 

[Jedi82]

is maybe the fact that I'm trying to load my external SSD disc with Catalina macOS on MacBook Pro late 2010 that not support Catalina?

 

[KeesMacPro]

The MBP 2010 does not support Catalina, that's why it will not boot.

If you really would like to install it ,there are ways :OpenCore or DosDude are the most common ones.

Maybe this is helpful to get an idea:

macOS 10.15 Catalina on Unsupported Macs

How to update Catalina Machine Support Video Card Support Pre-Metal AMD video cards (Radeon HD 6xxx series and older without acceleration, Radeon HD 4xxx series and older with acceleration.) Pre-Metal Nvidia video cards (GeForce 5xx series and older without acceleration, GeForce 3xx...

forums.macrumors.com

macOS Catalina Patcher

 

[Longkeg]

is maybe the fact that I'm trying to load my external SSD disc with Catalina macOS on MacBook Pro late 2010 that not support Catalina?

Bingo!

macOS Catalina - Technical Specifications - Apple Support

support.apple.com

 

[Jedi82]

Yeah!!! Will tell you soon if it was his fault. I will try the boot from external on another iMac