Hello,
I have a 21.5-inch late 2013 Mac and the sofware version OS X Yosomite 10.10.5 installed - last possibel update done.
Related to the problem that I get more and more uploade problems with Safari-web-sites ("Can´t get a secure channel to the server") I will ask you if somebody knows where I can get a later OS-Version, which ist better and would work in the hardware surrounding.
Thank you in advance!
Harry
iMac 21.5″, OS X 10.10
Your 2013 iMac can upgrade to MacOS X El Capitan 10.11, macOS Sierra 10.12 macOS High Sierra 10.13,
macOS Mojave 10.14 and macOS Catalina10.15.
If you want to upgrade to Mojave or Catalina I would recommend you upgrade to High Sierra first.
Open Safari and click on this link,
How to get old versions of macOS – Apple Support
Go to Check Compatibility to see if your mac qualifies for the OS upgrade you want.
Then go to the Download OS section and click on the OS you want to install.
Before upgrading make a full back up of your Mac.
Check that third party apps you use have updates available for the new OS.
Check that your printers/ scanners etc have updated drivers and software available for the new OS.
Connect your mac to your router via cable rather than rely on WiFi.
Do not use your mac while it is downloading
and do not use any other devices that share the same internet connection.
If the App Store says ‘Open’ then it is detecting a previous download of the install app
go to the Applications folder locate Install macOS ******.app.
Move it to the Trash, empty the Trash.
Restart, click on the link again, the App Store should say ‘Get' or 'Download'.
If you are considering upgrading to Catalina or be warned it does not support 32bit apps.
Your Mac is probably running 32bit apps and these will need to be updated to 64bit apps,
some updates may be free, some may be paid. Use this app to discover which apps you have
are 32bit, https://www.stclairsoft.com/Go64/ then contact the developers of the software to see
if they are offering 64bit updates.
Your 2013 iMac can upgrade to MacOS X El Capitan 10.11, macOS Sierra 10.12 macOS High Sierra 10.13,
macOS Mojave 10.14 and macOS Catalina10.15.
If you want to upgrade to Mojave or Catalina I would recommend you upgrade to High Sierra first.
Open Safari and click on this link,
How to get old versions of macOS – Apple Support
Go to Check Compatibility to see if your mac qualifies for the OS upgrade you want.
Then go to the Download OS section and click on the OS you want to install.
Before upgrading make a full back up of your Mac.
Check that third party apps you use have updates available for the new OS.
Check that your printers/ scanners etc have updated drivers and software available for the new OS.
Connect your mac to your router via cable rather than rely on WiFi.
Do not use your mac while it is downloading
and do not use any other devices that share the same internet connection.
If the App Store says ‘Open’ then it is detecting a previous download of the install app
go to the Applications folder locate Install macOS ******.app.
Move it to the Trash, empty the Trash.
Restart, click on the link again, the App Store should say ‘Get' or 'Download'.
If you are considering upgrading to Catalina or be warned it does not support 32bit apps.
Your Mac is probably running 32bit apps and these will need to be updated to 64bit apps,
some updates may be free, some may be paid. Use this app to discover which apps you have
are 32bit, https://www.stclairsoft.com/Go64/ then contact the developers of the software to see
if they are offering 64bit updates.
Thank you for the right and top answer. I updated step by step and finalized with Catalina! Safari works :-)
Best regards, Harry
update the last possible version - Mac 2013
