![]() The issue has to do with Apple’s transition from 32-bit to 64-bit apps. On the newer macOS Catalina, you’ll see a similar pop-up box stating your app “needs to be updated.” But after upgrading to Catalina, apps that prompt this error will not run at all. If you’re running macOS Mojave or High Sierra, you may have seen a pop-up box like this appear recently: Apple ![]() The problem? Aside from the typical headaches plaguing users attempting to install OS upgrades, Catalina is more than your average software update - it fundamentally changes what apps you can (or, more accurately, can’t) use on your Mac. ![]() While the dozens of new features are compelling, you might want to hold off before downloading Catalina. It downloads it to the Applications folder contained within that eDrive partition, and I subsequently copied it to a flash drive.Īgain, I have no firm proof that the latest Security Update for Mojave "caused" this issue, but that seems to be the case.Apple on Monday released its anticipated macOS Catalina software update, bringing a slew of new features, apps, and user-friendly improvements to the company’s line of Mac computers, including the iMac, MacBook and more. Well, yesterday while using the eDrive on my Mac Mini, I "visited" the App Store, and it did let me download the full OS 10.15.1 installer. The eDrives on both of my Macs were created (by me, via TechTool Pro) about a month or so ago, and thus do not contain that latest Security Update. Setting it up basically permits TechTool Pro to create a small eDrive partition containing the "basics" of the OS one is using, plus just about all the functionality of TechTool Pro. As I have mentioned before, TechTool Pro has a feature called an "eDrive', which is some what akin to the Recovery HD partition. ![]() However, I found another way to get it, even from my Mojave-based Macs. Prior to that, I was able to download the full installer for Catalina, V10.15, twice. The reason I say that is the other day, I applied that security update to both of my machines, and that seems to be when all this started. Yesterday I spent a good amount of time scouring both of my Mojave-based Macs for issues, but it seems this very recent restriction about preventing the download of the full Catalina installer if one is using a prior OS could be "connected" with the latest Security Update for Mojave. And I certainly appreciate you letting us know about that command. But no sweat, as I don't need it immediately, especially since I am still testing Catalina on that external SSD (two of my critical apps do not yet have Catalina updates available: SuperDuper!, and TechTool Pro).Ĭlick to expand.Yeah, I assume that is the case. Right now, the full OS 10.1.5.1 installation file is "not available" from the App Store. When I boot my Mac from that external SSD, I can use it to test out Catalina. I have actually done all that "kind of" in reverse, where I have done the installation of Catalina on an external SSD, then migrate/copy needed information. (I usually have 2 more tasks to do after that completes: install the new, Mac OS specific version of Onyx, and make the TechTool Pro eDrive). When I restart the Mac, I have that new Mac OS, along with all my apps, settings, etc. from that just completed backup, and away it goes. Finally, I am offered the opportunity to migrate/copy needed files, folders, settings, etc. That does a full, clean, "virgin" installation of that Mac OS onto the internal SSD. Next, I boot from that SuperDuper! backup, use Disk Utility there to Erase and Format the internal SSD on the respective Mac, navigate to that (copied) Mac OS full installation file, and launch it. After doing one final cleanup of my current system (and that new Installation file will be there), I make a SuperDuper! backup. I always download the full installer, stop the subsequent installation process, make a copy of that installer file in another location on my machine, and then remove the one that landed in the Applications folder. For the subsequent installation, it is NOT required to have a prior Mac OS on the machine. If one instead downloads the FULL Installer, that is NOT done through that Preference pane. So, when that is downloaded, the installation process begins immediately, and updates the prior "eligible" Mac OS to the new one. Via the Software Update Preference Panel, one is downloading an update of the new Mac OS to the prior one. Click the button to install, and when a window appears, click "Continue" to begin the process." Open up the App Store in your current version of macOS, then search for macOS Catalina. You can download and install macOS Catalina from the App Store on your Mac.
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