Go to the Applications folder locate Install macOS ******.app. If the App Store says ‘Open’ then it is detecting a previous download of the install app How to upgrade to macOS High Sierra - Apple Supportīefore upgrading make a full back up of your Mac.Ĭheck that third party apps you use have updates available for the new OS.Ĭheck that your printers/ scanners etc have updated drivers and software available for the new OS.Ĭonnect your mac to your router via cable rather than rely on WiFi.ĭo not use your mac while it is downloadingĪnd do not use any other devices that share the same internet connection. How to upgrade to macOS Mojave - Apple Support Please use Safari to access the following links do not use Firefox That installed and working you can consider upgrading further either to Mojave or Catalina.

With that in mind I would recommend upgrading first to macOS High Sierra and once you have got Will convert the internal SSD to APFS, in some cases others have experienced that if doing thisįrom older OS's like El Capitan or Yosemite the installation can get stuck at the conversion phase. When upgrading to any of the newer OS's from an older one like El Capitan the installation With the introduction of macOS High Sierra Apple introduced the new APFS file system.

Once the list has been created you can thenĬontact the developers of the apps to see if they provide 64bit updates. Use this app to discover which apps you haveĪre 32bit. Some updates may be free, some may be paid. Your Mac is probably running 32bit apps and these will need to be updated to 64bit apps, If you are considering upgrading to Catalina be warned that it does not support 32bit apps.

How much RAM does your mac have installed, Mojave and Catalina benefit from havingĨGBs of RAM minimum, the others are OK on 4GBs minimum. It will probably be able to upgrade to Big Sur when it is released in the near future. Your mac being a 2015 model can upgrade to any macOS from Sierra, High Sierra, Mojave and Catalina,

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