Overview The Apple Developer Program provides everything you need to build and distribute your apps on the Mac App Store. Membership includes access to beta OS releases, advanced app capabilities, and tools to develop, test, and distribute apps and Safari extensions. For more information, visit Apple Developer Program. Apple has released the public beta for macOS Mojave, the version 10.14 of Apple's desktop OS. Developers and early adopters who are interested in testing it out-along with all the new productivity. MacOS Big Sur is now available to the public, but there is still a developer beta line that needs testing before Apple launches new iterations to the public. Apple provides a beta version of its macOS releases to developers so that they can test their apps against it and prepare for the release to Mac owners. Aug 18, 2018 Apple has released the public beta for macOS Mojave, the version 10.14 of Apple's desktop OS. Developers and early adopters who are interested in testing it out-along with all the new productivity. Apple Beta Software Program Help make the next releases of iOS, iPadOS, macOS, tvOS and watchOS our best yet. As a member of the Apple Beta Software Program, you can take part in shaping Apple software by test-driving pre-release versions and letting us know.
macOS is a series of operating systems developed by Apple for their Mac platform. macOS is the second-most commonly used operating system after Microsoft Windows. It first became publicly available in 1984 with the release of the Macintosh 128k.
The classic Mac OS was originally written for the Motorola 68k architecture. The 68k architecture was used from 1984 to 1991, after which Apple transitioned to PowerPC. PowerPC would be used until the classic Mac OS's discontinuation in 2002. Classic Mac OS was based on a simple kernel design, which eventually became too limited and crash-prone for applications. In response, Apple bought NeXT and used NeXTSTEP as a base to develop Mac OS X. In 2006, Apple switched to Intel-based x86 processors in Macs. Support for PowerPC in Mac OS X was dropped in 2009.
At WWDC 2020, Apple declared that they would switch over to the Apple Silicon SoC in future Mac computers.
The Classic Mac OS can run standalone, and under Mac OS X using the Classic system layer. Mount and blade warband keygen generator. Only certain versions of Mac OS 9 can run under the Classic system layer, and the layer itself was dropped after Mac OS X Tiger.
PearPC is a useful emulator that can run PowerPC builds of Mac OS X under Windows or other x86 operating systems. PCE and Mini vMac are able to run 68k builds of Mac OS, QEMU is also capable of running earlier PPC builds of MacOS, and VirtualBox and VMware Fusion can run x86/64 builds of Mac OS X.
Timeline[edit | edit source]
Classic[edit | edit source]
The original Macintosh System Software is based on the Lisa OS and UI concepts from Xerox PARC. It uses a monolithic architecture but lacks support for memory management, protected memory, access controls, and conflict-free extensions. Only one application at a time could be supported under System Software until version 5 when MultiFinder was introduced. In 1997, Apple rebranded the Macintosh System Software to Mac OS. Mac OS would continue to be developed until the introduction of Mac OS X, after which Apple only delivered minor updates to the classic Mac OS. The final minor updates were designed to ease the transition to OS X. Carbon, an API introduced with Mac OS 8, works as the transitional API for classic Mac OS and Mac OS X applications.
| Name | Versions | Release date(s), Notes | Codenames |
|---|---|---|---|
| System Software 1.x | 1.0-1.1h | Released in January 1984-April 1984; uses the 68k architecture | |
| System Software 2.x | 2.0-2.1 | Released in April 1985-September 1985 | |
| System Software 3.x | 3.0-3.3 | Released in January 1986-June 1987 | |
| System Software 4.x | 4.0-4.1.1 | Released in January 1987-July 1989 | |
| System Software 5.x | 5.0-5.1 | Released in October 1987-February 1988 | |
| System Software 6.x | 6.0-6.0.8.1 | Released in 1988-1992 | |
| Mac OS 7.x | 7.0-7.6.1 | Released in 1991-1997; first version to oficially run on PowerPC (added on version 7.1.2) | Big Bang, Superbeta, Cube-E, Shuswap, Capone, Jirocho, Mozart, Son of Buster, Unity, Zeus, Gory, Harmony, Ides. |
| Mac OS 8.x | 8.0-8.6 | Released in 1997-1999; version 8.5 removed support for 68k | Copland, Tempo, Bride of Buster, Sequoia, Snowman, South Park, Allegro, Horatio, Veronica, Sarah. |
| Mac OS 9.x | 9.0-9.2.2 | Released in 1999-2001 | Sonata, Minuet, Fortissimo, Moonlight, Limelight, LU1. |
Mac OS X / macOS[edit | edit source]
Mac OS X is the current incarnation of Mac OS. The first version released was Mac OS X Server in 1999. Unlike the classic Mac OS, Mac OS X is based on NeXTSTEP (OPENSTEP) and uses its frameworks and architectures. In 2016, Apple began to use the macOS moniker to brand Mac OS X alongside their other operating systems (watchOS, tvOS, iOS).
| Name | OS version | Darwin version | Codename | Notes |
|---|---|---|---|---|
| Mac OS X Server 1.x | N/A | Rhapsody 5.3 - 5.6[note 1] | Rhapsody | Released in March 1999 |
| Mac OS X Public Beta | N/A | 1.2.1 | Kodiak | Released in September 2000; introduced the Aqua interface |
| Mac OS X Cheetah | 10.0 | 1.3.1 | Cheetah | Released in March 2001 |
| Mac OS X Puma | 10.1 | 1.4.1 / 5 | Puma | Released in September 2001 |
| Mac OS X Jaguar | 10.2 | 6 | Jaguar | Released in August 2002 |
| Mac OS X Panther | 10.3 | 7 | Pinot | Released in October 2003 |
| Mac OS X Tiger | 10.4 | 8 | Merlot (PPC), Chardonay (Intel) | Released in April 2005; first version to officially run on Intel (added in 10.4.1) |
| Mac OS X Leopard | 10.5 | 9 | Chablis | Released in October 2007 |
| Mac OS X Snow Leopard | 10.6 | 10 | Snow Leopard | Released in August 2009; removes support for PowerPC Macs |
| Mac OS X Lion | 10.7 | 11 | Barolo | Released in July 2011; removes support for PPC-only applications via Rosetta; removes support for x86 processors |
| OS X Mountain Lion | 10.8 | 12 | Zinfandel | Released in July 2012; removes the 32-bit kernel and 32-bit EFI bootloader |
| OS X Mavericks | 10.9 | 13 | Cabernet | Released in October 2013 |
| OS X Yosemite | 10.10 | 14 | Syrah | Released in October 2014; refreshed UI design |
| OS X El Capitan | 10.11 | 15 | Gala | Released in September 2015 |
| macOS Sierra | 10.12 | 16 | Fuji | Released in September 2016; removes support for non-SSE4 Intel CPUs |
| macOS High Sierra | 10.13 | 17 | Lobo | Released in September 2017 |
| macOS Mojave | 10.14 | 18 | Liberty | Released in September 2018 |
| macOS Catalina | 10.15 | 19 | Catalina | Released in October 2019; removes support for 32-bit applications |
| macOS Big Sur | 11.x | 20 | Big Sur | Released in November 2020; refreshed UI design; first version to run on Apple Silicon |
| Name | OS version | Darwin version | Codename | Notes |
|---|---|---|---|---|
| Mac OS X Server 1.x | N/A | Rhapsody 5.3 - 5.6[note 1] | Rhapsody | Released in March 1999 |
| Mac OS X Public Beta | N/A | 1.2.1 | Kodiak | Released in September 2000; introduced the Aqua interface |
| Mac OS X Cheetah | 10.0 | 1.3.1 | Cheetah | Released in March 2001 |
| Mac OS X Puma | 10.1 | 1.4.1 / 5 | Puma | Released in September 2001 |
| Mac OS X Jaguar | 10.2 | 6 | Jaguar | Released in August 2002 |
| Mac OS X Panther | 10.3 | 7 | Pinot | Released in October 2003 |
| Mac OS X Tiger | 10.4 | 8 | Merlot (PPC), Chardonay (Intel) | Released in April 2005; first version to officially run on Intel (added in 10.4.1) |
| Mac OS X Leopard | 10.5 | 9 | Chablis | Released in October 2007 |
| Mac OS X Snow Leopard | 10.6 | 10 | Snow Leopard | Released in August 2009; removes support for PowerPC Macs |
| Mac OS X Lion | 10.7 | 11 | Barolo | Released in July 2011; removes support for PPC-only applications via Rosetta; removes support for x86 processors |
| OS X Mountain Lion | 10.8 | 12 | Zinfandel | Released in July 2012; removes the 32-bit kernel and 32-bit EFI bootloader |
| OS X Mavericks | 10.9 | 13 | Cabernet | Released in October 2013 |
| OS X Yosemite | 10.10 | 14 | Syrah | Released in October 2014; refreshed UI design |
| OS X El Capitan | 10.11 | 15 | Gala | Released in September 2015 |
| macOS Sierra | 10.12 | 16 | Fuji | Released in September 2016; removes support for non-SSE4 Intel CPUs |
| macOS High Sierra | 10.13 | 17 | Lobo | Released in September 2017 |
| macOS Mojave | 10.14 | 18 | Liberty | Released in September 2018 |
| macOS Catalina | 10.15 | 19 | Catalina | Released in October 2019; removes support for 32-bit applications |
| macOS Big Sur | 11.x | 20 | Big Sur | Released in November 2020; refreshed UI design; first version to run on Apple Silicon |
Notes[edit | edit source]
- ↑Mac OS X Server 1.x is a direct descendant of the NeXTSTEP/OPENSTEP codebase and is not based on Darwin.
Apple has released the next version of macOS 11 named Big Sur at WWDC 2020. The looks and visual changes have been amazing. If you are excited and want to install it then take a look at this ultimate guide to download macOS Big Sur 11.5 developer beta 1 on your Mac.
macOS Big Sur supported Mac
- MacBook 2015 and later
- MacBook Air 2013 and later
- MacBook Pro Late 2013 and later
- Mac mini 2014 and later
- iMac 2014 and later
- iMac Pro 2017 and later (all models)
- Mac Pro 2013 and later
- Mac Mini 2020
- MacBook Pro and Air (M1, 2020)
Take a backup of Mac before updating to macOS Big Sur
Even before installing regular updates, we suggest taking a backup of the macOS device. And this is a developer beta – most likely having bugs and other issues! So, we stress even more that you backup your Mac before installing macOS Big Sur. To do this:
- Plug in an external HDD or SSD to your Mac
- You will see a window asking you to use the drive to back up with Time Machine. Check the box for Encrypt Backup Disk. After this click on Use as Backup Disk.
- If you do not see the above window, click on the Apple icon, and select System Preferences. Click on Time Machine.
- Click on Select Backup Disk, and choose your drive.
- Finally, check the box for Encrypt Backups (recommended) and click on Use Disk.
- Check the box for Show Time Machine in the menu bar. Next, click on it from the top menu bar, and select Backup Now.
How to download macOS Big Sur 11.5 developer beta 1
- Visit developer.apple.com. Click on Account and sign in with your developer account
- Click on Downloads, from the left sidebar.
- Click on Install Profile for macOS Big Sur beta. This will download a .dmg file (around 134 KB).
- Go to the Downloads folder (or the folder where your browser saves files by default). Double-click on macOSDeveloperBetaAccessUtility.dmg file to open it.
- Next, double click on macOSDeveloperBetaAccessUtility.pkg
- Click on Continue, read, and agree to terms and conditions. Then, click on Install.
- Next, follow the instructions to install the macOS developer beta. System Preferences will automatically open, and you will see the Software Update screen. In case you do not, click the () Apple logo in the top left corner → Select System Preferences → Click Software Update.
Note: If even now you do not see an update for macOS Big Sur, restart your Mac and then go to the Software Update section - Here you can see the macOS Big Sur developer beta option. Click Upgrade Now and wait for the download to finish. Depending on your internet speed it may take a while.
How to install macOS Big Sur 11.5 developer beta 1
Macos Beta Profile
Once the full download completes, you will see a window asking you to start the installation process.
- Click on Continue.
- Click on Agree (if you do). Confirm by clicking Agree again
- Click on Install. (on my MacBook Pro, it needed 50 GB of free space for installation. If required clear some space.)
- Finally, go through the simple on-screen instructions
It usually takes considerable time for the entire installation process to finish. Once the full process completes, click on Continue, enter your Apple ID password, and explore the beautiful macOS 11.
Macos Beta Cycle
How to install macOS Big Sur 11.5 developer beta 1 on a Partition
To keep things safe, you may choose to install the beta version of macOS on Mac's storage partition. This keeps the current operating system and the beta separate. Here is how to do that.
- First of all, you will have to create a partition on Mac. If you already have a partition, read on
- After the download completes, you see a window asking you to start the installation. Click on Continue.
- Click on Agree and confirm
- Here, select a partition. Click Show All Disks to choose a partition
- Finally, click on Install.
That's all!
These are straightforward steps to download and install macOS Big Sur developer beta.
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