If upgrading from macOS Sierra or later, your Mac needs 35.5GB of available storage to upgrade. If upgrading from an earlier release, your Mac needs up to 44.5GB of available storage. To upgrade from OS X Mountain Lion, first upgrade to OS X El Capitan, then upgrade to macOS Big Sur. Look for OS X Mountain Lion, hold down the Option key and click Download. Downgrade from OSX El Capitan to Mountain Lion. Enter your Apple ID and password if asked.This may take up between 10 and 60 minutes, depending on your Internet connection speed. Download Mountain Lion to create bootable USB Install Media. If you’re running any release from macOS 10.13 to 10.9, you can upgrade to macOS Big Sur from the App Store. If you’re running Mountain Lion 10.8, you will need to upgrade to El Capitan 10.11 first.
macOS Support
The current Apache OpenOffice supports Apple OS X version 10.7 (Lion), 10.8 (Mountain Lion), 10.9 (Mavericks), 10.10 (Yosemite), 10.11 (El Capitan) and macOS 10.12 (Sierra), 10.13 (High Sierra), 10.14 (Mojave), 10.15 (Catalina).
The last OpenOffice version supporting Mac OS X 10.4 (Tiger), 10.5 (Leopard), 10.6 (Snow Leopard) is OpenOffice 4.0.1.
Hardware Requirements
- CPU: Intel Processor
- Memory: Minimum 512 Mbytes RAM.
- Storage: At least 400 Mbytes available disk space for a default install via download.
- Graphics: 1024 x 768 or higher resolution with 16.7 million colours.
Additional Resources
Mac Os X Mountain Lion Upgrade To El Capitan Software
- Click here to download
- Click here to get install instructions for OpenOffice on macOS
- Click here to get help and support in the Community Support Forums
Operating system upgrades bring increases in efficiency, new features, stronger security, and updates to included software utilities. The following page shows you how to upgrade your Apple Macintosh desktop or laptop computer to Catalina (10.15), the current version of macOS.
- Check compatibility.
Check compatibility
Before installing Catalina, verify your Mac is eligible for the upgrade.
Verify the model of your Mac
The following Mac models can be upgraded to macOS Catalina.
- Mac Pro - All models produced from mid-2013 and later.
- MacBook Pro - All models produced from mid-2012 and later.
- iMac - All models produced from late 2012 and later.
- MacBook - All models produced from late-2015 and later.
- MacBook Air - All models produced from late-2012 and later.
- Mac mini - All models from mid-2012 or later.
If your Mac is not on this list, you cannot upgrade to Catalina. However, you can still try to upgrade to El Capitan.
Back up your data
Although not required, we strongly recommend you back up your Mac before proceeding with an upgrade. If anything goes wrong, you can restore your Mac to its previous state.
Check your OS version
The following versions of OS X and macOS can be upgraded to macOS Catalina.
| OS name | Version | Release date |
|---|---|---|
| OS X Lion* | 10.7 | July 20, 2011 |
| OS X Mountain Lion* | 10.8 | July 25, 2012 |
| OS X Mavericks | 10.9 | October 22, 2013 |
| OS X Yosemite | 10.10 | October 16, 2014 |
| OS X El Capitan | 10.11 | June 8, 2015 |
| macOS Sierra | 10.12 | June 13, 2016 |
| macOS High Sierra | 10.13 | June 5, 2017 |
| macOS Mojave | 10.14 | June 4, 2018 |
* If your Mac is running OS X Lion or Mountain Lion, you must upgrade to El Capitan before you can upgrade to Catalina.
If your Mac is running Mavericks or newer, you can proceed to upgrade to Catalina.
Upgrade to El Capitan, if necessary
If your Mac is running OS X Lion or Mountain Lion, follow these steps to upgrade to El Capitan.
- Download the El Capitan installer from Apple. The file size is 5.8 GB, so the download may take a while, depending on the speed of your Internet connection.
- Double-click the downloaded archive, InstallMacOSX.dmg, to view its contents.
- In the archive, double-click InstallMacOSX.pkg.
- Follow the on-screen instructions to perform a compatibility check, and prepare for installation.
- When this process is complete, an installer application named Install OS X El Capitan is placed in your Applications folder. Double-click it to begin installation.
- During installation, your Mac may restart, or display a blank screen short time. Do not close the lid or power off your Mac until installation is complete.
Upgrade to Catalina
After you've gone through the preparation steps, you need to download and install the latest version of macOS. The following steps show you how.
- In the menu bar, click the Apple icon to open the Apple menu.
- In the Apple menu, select App Store.
Mac Os X Mountain Lion Upgrade To El Capitan
- In the App Store, on the left side of the window, select Updates.
- In the Updates window, locate the line that says Catalina.
- On the far right side, select Update.
- Catalina is downloaded and installed.
- During installation, your Mac may restart, or display a blank screen for a short time. Do not close the lid or power off your Mac until installation is complete.
Additional information
Os X Mountain Lion Free Download
- See our update definition for further information and related links.
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