upgrading to catalina 10.15.5

I want to upgrade my macbook to the macos catalina 10.15.5.After pressing "upgrade now" button there is a window which says that the mac must be restart in order to be upgraded.My mac restarts successfully but the upgrade is not installed.I tried to repeat this processes several times but still mac is not upgraded to 10.15.5 my current version is catalina 10.15.4

MacBook Pro 13″, macOS 10.15

Posted on Jun 12, 2020 8:31 PM

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Question marked as Top-ranking reply

Posted on Jun 12, 2020 9:06 PM

Before You Upgrade macOS


  1. Fix any problems before upgrading.
  2. Run First Aid in Disk Utility while booted from your Recovery HD.
  3. Backup. Make a bootable clone using CarbonCopy Cloner or use TimeMachine.
  4. Be sure your startup disk has 18-20GB of free space during the installation.
  5. Upgrade third-party software for compatibility. See App Compatibility Table - RoaringApps. If you have mission critical software, then DO NOT upgrade until you know that software is compatible with the version of macOS you are about to install.
  6. Disconnect all third-party peripherals.
  7. Download the installer which will be in the Applications folder. Quit the installer after it opens, then make a copy of the installer and save it in the Downloads folder. The one in the Applications folder will be deleted after a successful installation.
  8. The download is large, anywhere between 5 and 9GBs. It takes time to complete. Be patient.
  9. Double-click on the installer in the Applications folder. Click on the start button to begin the installation.


Download and Install the macOS Catalina 10.15.5 Combo Update.


1 reply
Question marked as Top-ranking reply

Jun 12, 2020 9:06 PM in response to mrknva02

Before You Upgrade macOS


  1. Fix any problems before upgrading.
  2. Run First Aid in Disk Utility while booted from your Recovery HD.
  3. Backup. Make a bootable clone using CarbonCopy Cloner or use TimeMachine.
  4. Be sure your startup disk has 18-20GB of free space during the installation.
  5. Upgrade third-party software for compatibility. See App Compatibility Table - RoaringApps. If you have mission critical software, then DO NOT upgrade until you know that software is compatible with the version of macOS you are about to install.
  6. Disconnect all third-party peripherals.
  7. Download the installer which will be in the Applications folder. Quit the installer after it opens, then make a copy of the installer and save it in the Downloads folder. The one in the Applications folder will be deleted after a successful installation.
  8. The download is large, anywhere between 5 and 9GBs. It takes time to complete. Be patient.
  9. Double-click on the installer in the Applications folder. Click on the start button to begin the installation.


Download and Install the macOS Catalina 10.15.5 Combo Update.


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upgrading to catalina 10.15.5

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