A new entry in the annals of unfortunate software release dates:

Jan 09, 2018  If you can't find a native version for High Sierra, you could always install Virtual Box and a Linux x64 distro. Virthual Box, with the Guest Additions installed allows apps running on the Linux VM to run in a window on the Mac with the Linux OS running in the background. Darwin (the Mac OS X kernel) on x86 is considered 'high' priority, which is good news. The bad news is, it's been high priority for at least 4 years or more.

• On August 19, Valgrind 3.5.0 was released. It added support for Mac OS 10.5.
• On August 28, Mac OS 10.6 was released.
• Valgrind 3.5.0 does not support Mac OS 10.6.

If you try to install Valgrind on a machine running Mac OS 10.6, it will fail at configure-time. If you hack the configure file appropriately so that the install completes, Valgrind will run but crash quickly on any program. Bug 205241 has the details. Greg Parker says he has a series of patches to make Valgrind work and he’s just waiting for the open source release of xnu (the core of Mac OS X) before making them public. With some luck, these fixes will make it into Valgrind 3.5.1 relatively soon.

However, once that’s fixed, there’s another problem. Mac OS 10.6 uses 64-bit executables by default. In comparison, 10.5 uses 32-bit executables by default, even though it’s capable of creating and running 64-bit executables. Unfortunately Valgrind’s support for 64-bit executables on Mac OS X isn’t very good. The main problem is that start-up is sloooooow, which means that even Hello World takes over four seconds to run on my MacBook Pro. Fixing this one will be harder, as it will require reworking the Mac OS X start-up sequence. Bug 205938 is tracking this problem.

Related to this: does anyone know if there is an easy way to have both 10.5 and 10.6 installed on a single machine? That would be a big help when it comes to developing and testing Valgrind’s Mac OS X support.

macOS Catalina gives you more of everything you love about Mac. Experience music, TV, and podcasts in three all-new Mac apps. Enjoy your favorite iPad apps now on your Mac. Extend your workspace and expand your creativity with iPad and Apple Pencil. And discover smart new features in the apps you use every day. Now you can take everything you do above and beyond.

Check compatibility

If you're using one of these computers with OS X Mavericks or later,* you can install macOS Catalina. Gopro studio for mac 10.7.5 download. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier.

MacBook introduced in 2015 or later
MacBook Air introduced in 2012 or later
MacBook Pro introduced in 2012 or later
Mac mini introduced in 2012 or later
iMac introduced in 2012 or later
iMac Pro (all models)
Mac Pro introduced in 2013 or later

* To upgrade from Lion or Mountain Lion, first upgrade to El Capitan, then upgrade to Catalina. To find your macOS version, Mac model, memory, and storage space, choose About This Mac from the Apple menu . If your Mac isn't compatible with macOS Catalina, the installer will let you know. View the complete list of compatible computers.

Make a backup

Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.

Get connected

It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.

Download macOS Catalina

If you're using macOS Mojave, get macOS Catalina via Software Update: Choose Apple menu  > System Preferences, then click Software Update.

Or use this link to open the macOS Catalina page on the App Store: Get macOS Catalina. Then click the Get button or iCloud download icon.

Begin installation

After downloading, the installer opens automatically.

Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.

If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.

Allow installation to complete

Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.

Stay up to date

After installing macOS Catalina, you will be notified when updates to macOS Catalina are available. You can also use Software Update to check for updates: Choose Apple menu  > System Preferences, then click Software Update.

Or get macOS Catalina automatically

If you're using OS X El Capitan v10.11.5 or later and your App Store preferences or Software Update preferences are set to download new updates when available, macOS Catalina will download conveniently in the background, making it even easier to upgrade. A notification will inform you when macOS Catalina is ready to be installed. Click Install to get started, or dismiss the notification to install later. When you're ready to install, just open the file named Install macOS Catalina from your Applications folder.

Learn more

• If the installer shows a list of apps that are not optimized for your Mac, learn about 32-bit app compatibility, then choose whether to proceed with the installation.
• For the strongest security and latest features, upgrade to macOS Catalina. If you have hardware or software that isn't compatible with Catalina, you might be able to install an earlier macOS, such as Mojave, High Sierra, Sierra, or El Capitan.
• You can also use macOS Recovery to reinstall macOS.