I cannot install any other version of Mac OS except 10.9
I cannot update my Macbook
I cannot update my Macbook
verify you are using the Safari browser to download/initiate the macOS links.
The older macOS installer backups on this server:
How to get old versions of macOS - Apple Support
OS X Yosemite - Technical Specifications - Apple Support
verify you are using the Safari browser to download/initiate the macOS links.
The older macOS installer backups on this server:
How to get old versions of macOS - Apple Support
OS X Yosemite - Technical Specifications - Apple Support
To obtain versions AFTER 10.11 El Capitan, you may need to install !0.11 El Capitan as a waypoint, before going further.
!0.11 El Capitan features an Improved Mac App Store App, that makes obtaining later versions more reliable.
I cannot install any other version of Mac OS except 10.9