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Do you need to back up before installing OS X Yosemite?
You should back up your Mac before installation. You can back up with Time Machine, for example. Use the Mac App Store to install this update and other available updates. Some updates become available only after installing another update. Don’t interrupt the installation process after it has begun.
Can you upgrade from OS X Yosemite to El Capitan?
Open that app from your Applications folder to begin installing the operating system. macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard Follow the onscreen instructions in the installer.
Which is the best update for OS X Yosemite?
The OS X Yosemite v10.10.5 Update is recommended for all OS X Yosemite users. The OS X Yosemite 10.10.5 update improves the stability, compatibility, and security of your Mac, and is recommended for all users. This update: Improves compatibility with certain email servers when using Mail
Which is the latest version of Mac OS Sierra?
macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard Follow the onscreen instructions in the installer. It might be easiest to begin installation in the evening so that it can complete overnight, if needed.
What are the issues with OS X Yosemite?
Causes: Regarding the former, this is a known issue that affects Macs upgraded to Yosemite from a previous version of OS X. Apple Mail seemingly “forgets” email server settings — typically the SMTP server settings — allowing users to only receive email but not send out.
Where do I get the OS X update?
You might have unexpected results if third-party OS X modifications have been installed, or you modified OS X through other means. You can also get this update from the Apple Support Downloads site. Standalone updates can be useful if you want to install the same update again or on another computer.
Which is the latest OS on my Mac?
My comouter is a Mac mid 2011 The App Store only shows updates for the OS you are using at the moment, in your case Yosemite 10.10.5. If you want to go to another newer OS that is called an upgrade. This can be done through the App Store using the following link. High Sierra is the last/ newest OS your Mac can use.
What to do if your Mac wont update to new OS?
Check to see with the developers of any third party apps you use that there are updates available so they will continue to work in the new OS. Another thing you need to check is if any printers/ scanners etc you use have updated drivers and software so they too can continue to function in the new OS. MoreLess