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2. Apple Mac OS 9.0 (HD Image)

Download macOS Monterey. MacOS Monterey (Version 12) is the Eighteenth major release. 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 what you think. Learn more about the next releases.

Xcode is a complete developer toolset for creating apps for Mac, iPhone, iPad, Apple Watch, and Apple TV. Xcode brings user interface design, coding, testing, debugging, and submitting to the App Store into a unified workflow.

Downloading and updating Xcode

Apr 10, 2020 Mac OS 9 Install Disc. Download 9 Files download 8 Original. CD-ROM Software Library. Mavericks 9.1.3; and older. The default browser for Apple devices and there are no official versions of Safari for other devices. Apple no longer supports Mac OS 10.14 for Macbooks older than 2012. No support for WebSQL; No support for Legacy Safari Extensions; Can't update Safari on OS X 10.5 (Leopard) or earlier. Before you upgrade, we recommend that you back up your Mac. If your Mac is running OS X Mavericks 10.9 or later, you can upgrade directly to macOS Big Sur. You’ll need the following: OS X 10.9 or later; 4GB of memory; 35.5GB available storage on macOS Sierra or later. Some features require an Apple ID; terms apply.

The current release of Xcode is available as a free download from the Mac App Store. The Mac App Store will notify you when an update is available or you can have macOS update automatically as it becomes available.

The latest beta version and previous versions of Xcode can be downloaded from the Downloads page. To download Xcode, simply sign in with your Apple ID.Apple Developer Program membership is not required.

Using Xcode

Get step-by-step guidance on how to use Xcode to build, test, and submit apps to the App Store.

Submitting apps to the App Store using Xcode

Xcode provides an integrated workflow for Apple Developer Program members to prepare and submit apps to the App Store. Use the latest version of Xcode available on the Mac App Store to submit your apps or, when available, the latest Release Candidate from the Downloads page.

Don't submit apps built using beta software, as beta versions of Xcode, Operating Systems, and SDKs are for development and testing only.

Learning about changes to Xcode

To learn about the latest features and capabilities in Xcode, see What’s New in Xcode. For update details in the latest released versions, including each beta release, see the Xcode Release Notes.

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Minimum requirements and supported SDKs

Legend

Minimum OS Required: The version of macOS required to install this version of Xcode.

SDK: The version of SDKs included in this version of Xcode.

Architecture: The architectures supported for development by this version of Xcode.

OS: The iOS, iPadOS, macOS, tvOS, and watchOS versions supported by this version of Xcode for developing, installing, and debugging applications.

Simulator: Versions of iOS, tvOS, and watchOS simulators supported for development by this version of Xcode.

Apple Mac OS 9.0 (HD Image)

Swift: Version of Swift supported for development by this version of Xcode.

Providing feedback and reporting bugs

Your feedback goes a long way toward making Xcode even better. With Feedback Assistant, you can report issues or request enhancements to APIs and tools. Provide detailed information about issues, including your system and developer tool versions, and any relevant crash logs or console messages. To ask questions and find answers from Apple engineers and other developers, visit the Apple Developer Forums.

Invalid private key and certificate pairing

If you receive an error message saying, 'Xcode could not find a valid private-key/certificate pair for this profile in your keychain,” the Keychain Access application on your Mac is missing either the public or private key for the certificate you’re using to sign your app.

This often happens when you're trying to sign and build your app from a different Mac than the one you originally used to request your code signing certificate. It can also happen if your certificate has expired or has been revoked. Ensure that your app’s provisioning profile contains a valid code signing certificate, and that the Keychain Access application on your Mac contains that certificate, the private key originally used to generate that certificate, and the WWDR Intermediate Certificate.

For instructions on how to resolve this and other code signing errors, review the Code Signing Support page.

Apple security updates

For information on the security content of Xcode updates, visit the Apple security updates page.

Reinstalling Mac OS 9 on a PowerMac G4 MDD

The PowerMac G4 MDD was Apple’s last Mac capable of dual-booting into both Mac OS 9 and OS X. The last of the G4 towers, this model was originally introduced in 2002, briefly evolved into an OS X-only configuration with FireWire 800 in 2003, then returned to the original design for another year.

Due to the need for some customers to run Mac OS 9 for several years after the introduction of OS X, Apple continued to sell this configuration online in parallel with the PowerMac G5 for over a year. They never pushed this option on the Apple Store but it was a consistently strong seller.

These machines came set from the factory to boot into Mac OS X, with OS 9 also loaded on the hard drive. No OS 9 installer was provided, rather that was available as part of the Software Restore CDs bundled with the Mac. The MDD uses a model-specific version of Mac OS 9.2.2, newer than what was included on the last retail OS 9 installer. You need the bundled discs if you want to reinstall a bootable OS 9 on this machine. (Note: only MDDs without FireWire 800 ports can boot into OS 9, models with FireWire 800 ports require OS X. The install CD I used is Apple part number 691-4078-A.)

Recently I was contacted by a client who was looking for just this. He had a dual 1.25GHz MDD with some older ProTools hardware, and preferred to run the software in OS 9 rather than OS X. The problem was his installation of OS 9 was unstable so he was looking for the original installer. Did I have a copy of this rare item?

Off-the-shelf I did not, but fortunately I knew what he meant and where to get one. My last job before running Oakbog full time was as IT Manager for a recording studio, and we ran ProTools hardware and software on these very Mac models! We had about 5 of those systems at one point, so I suspected there were plenty of CDs still buried deep in drawers. Fortunately there were, I contacted my colleagues at the studio and arranged to get a set of the install discs.

My client didn’t need Mac OS X, nor was he interested in first installing OS X 10.2.1 on his tower before restoring the OS 9 image. He just needed a bootable OS 9 System Folder. I suspected this was included on the set of four CDs somewhere, but it isn’t a Finder-visible file.

A bit of sleuthing in Terminal helped find the mystery location. The OS 9 software is in a hidden directory called .images on the first disc. Inside there are several files including OS9General.dmg. I was able to mount (open) this disk image to the desktop via the following Terminal command:

open /Volumes/Restore CD/.images/OS9General.dmg

That takes a few minutes, then mounts a volume called OS 9 Content onto the desktop. Inside here are our old friends Applications (Mac OS 9) and System Folder, just as we know and love.

To test this worked before sending to my client, I copied the two folders to an external FireWire drive (formatted with OS 9 drivers), then connected this to my MDD running Tiger. The Startup Disk Preference Pane showed the external drive with Mac OS 9 as a valid boot choice. Restart, a few screen flickers later, and voila! Welcome to Mac OS 9.2 appears on the screen.

Mission accomplished. I now had a valid boot system for Mac OS 9 on an MDD, along with the disc image. My client was thrilled to hear the good news, and I sent him a copy on CD the next day.

The story continues: Mac OS 9 Isn’t Dead Yet…

—–
Update June 2012:
Mac OS 9 for PowerMac G4 MDD has been made available for download via the Macintosh Garden.

1. Hi, downloaded your cds on macintosh garden, to install on my Gigabit Ethernet, it now detects an os9 system but when I try to boot to it, a floppy with a question mark appears and my hdd starts spinning, any idea?

2. Hi,
   I have my old G4 MDD dual 1.25 and I have OS9General.dmg
   i try to burn it with Disk Utility and Toast, but it is not a BOOTABLE CD.
   I can only copy all folder and document on my hard disk and it work.

   BUT I AM LOOKING FOR A BOOTABLE OS9 INSTALLER CD or DVD.

   thx a lot

3. does anyone have the powermac g4 original restore disk for the 1.25ghz MDD 2003?? the disc im looking for is a DVD, and its part number is z691-4409-a – it includes 10.2.6 mac os x + mac os 9.22 as well as AHT 2.02. someone i spoke to online has the disc but he claims hes never been able to successfully copy it. is this a known issue to anyone else?
   i have the 1.25ghz mdd 2003 model and would like to get its specific original disc to restore it to factory settings!

4. Hi Adam, how did you create the partition on the external firewire hard drive and use the Mac OS 9 HDD driver to boot off it, Did you run the disktools in Classic to create the external partition, or is just “Blessing” the hard drive enough to set it as the active partition to boot from? I also used OS9helper in classic to update a OS 9.04 system that I copied off my previous Beige G3 Mac to install OS 9.2.2 within classic and make it bootable on a 2002 G4 Quicksilver that I built from pieces that I bought on Ebay.

   Thank you for the help, and the article!
   Jose F. Medeiros

5. I have a G4 mirror. It had 1 hard drive. Another computer I had was running system 9.2.2 for my Scitex, and it died. I took the hard drive and put it into the 2nd drive spot and hooked it up in the g4 mirror. I can see everything on that drive and I can access all the files. When I go into the system preferences and go to the startup disk and select system 9 and restart, I get a ? folder. When I try to reinstall system 9.2.2 I get a message Quicktime is not compatible, please upgrade to QT 6.0.3. When I try to start Classic it says the same thing. I need to run system 9 to run my Scitex software, any ideas?

6. Adam,

   I found a G4 powermac (the one with oval bay doors – quick silver model I think?) in the dumpster. Anyhow, I put a spare blank hard drive in it and it booted right up. It gives me the “wheres the os” ?/finder icon in the middle of the gray screen. Unfortunately I don’t have a FW drive or any clones of previous ppc 9 installs from back in the day.

   * I want to install OS9 classic on it but how does one open up the cd tray to put the cd in?
   * I do have some backups of my white intel iMac and my 08 intel MBP. If I switch them to a FW drive, will they work even though they are for intel machines?

   I’m hoping I just stick my OS9.2.1 disc into the g4 PM, and it should install 123 like my old bondi blue g3. Any other tips? Thanks for your help!

7. Hi Adam

   Thanks for your site – lovely. I had a collection of old Macs starting with a couple SE’s, moving up through 10 Classics, Colour Classics, several pizza boxes (LC, LCII, 430,etc),630, 4400, 6 Grey G3’s and 4 G4 towers as well as a couple of ancient laptops, an Atari STE and 2 BBC micros. Most of these I gave away to an IT technician friend who was starting a computer museum in his garage. I still have over a dozen original install/software discs for OS 9 and OSX for PPC, iMac, iBook, etc and wondered if they were worth keeping/passing on. They range from the old orange disks up to 2005 Mac Pro disks.

8. I have the MDD that is duel 1GHz can I replace the CPU’s with The 1.25GHz Chipset and Have it work? without any additional tinkering?

9. Adam,
   I wondered if you could help me with a trouble-shooting question.
   I recently had the “power supply” replaced on a G4 Tower (running OS 9.2) and computer boots, no problem. However, ever since, the computer seemingly refuses to accept any file transfer from any external device (whether a folder of pictures, other docs).
   A typical scroll bar appears indicating how many items new to be copied, but the scroll bar sits still, instead of moving, and in effect, stays still with no other action. I checked extensions, etc. for anything appearing out of sorts – but could not find a sourse of the problem.
   (PS – I use the G4 as a back-up server (to another G4) for a medical office software; the software will open – no problem – from any recent back-up off the main server; but as I said, I cannot copy the folder permanently onto the device, as I had long done in the past). Any thoughts would be sincerely appreciated, Thank you

10. I made a bootable USB stick with Mac OS 9.2.2, I can boot on it and install Mac OS 9.2.2 on my G3 : http://www.numopen.fr/Creer_une_cle_USB_Mac_OS_9_et_installer_Mac_OS_9