Go to the Apple logo in the top left of your screen and select About This Mac > System Report.Here’s how to check whether the game or app you want to use is 32 or 64-bit compatible. The same applies to some music production or DJ software for Mac that have lots of 32 bit plugins that will no longer work in the latest versions of macOS or on an M1/M2 Mac. The most notable program is Microsoft Office 2011 but there are also others like MetaTrader, Adobe CS5 and CS6, Aperture, older versions of iTunes, iBooks, iPhoto and some Steam games which are still 32-bit only. However, the problem for some Mac users is there are still some older applications and games that are still 32-bit only. If you try to run a 32 bit-app in Ventura, Monterey, Big Sur, Catalina or an M1 Mac, you’ll get the following “App is not optimized for your Mac and needs to be updated” error message: The latest Apple Silicon M1 chip Macs and M2 Macs are also incompatible with 32-bit games or apps and if you’re trying to run 32-bit an M1 Mac, we recommend you skip to the section on 32 bit games and apps on M1 & M2 Macs. You can only install 64-bit apps on Ventura, Monterey, Big Sur and Catalina which for most people isn’t a problem as almost all major software is now 64-bit. Apple dropped support for 32-bit applications in macOS Catalina and the last macOS to support them was Mojave. ![]() Usually the kernel won't need that much address space (it can manage around 32 GB of RAM for other apps).MacOS Ventura, Monterey, Big Sur, Catalina and M1 Macs do not run 32-bit apps or games. The limitations of booting into a 32-bit kernel are that the kernel itself can't access more than 4GB of RAM, and it can't use 64-bit kernel extensions. ![]() VMware Fusion's 32-bit install mode installs 32-bit EFI which is not possible to boot into 64-bit kernel.Īs far as I know, 64-bit programs will run just fine on the 32-bit kernel. But it is possible to use a 3rd party "32- or 64-bit Kernel Startup Mode Selector" to set 64-bit kernel boot mode and 64-bit kernel (System Profiler > Software > reports 64-bit Kernel and Extensions: Yes). VMware Fusion's 64-bit install mode installs 64-bit EFI which by default boots into 32-bit kernel. I wonder when the current certificates will expire again. It seems Apple has not unpdated all installers because even freshly downloaded earlier Combos failed. The certificates of my old archived installers had expired.Ī fresh copy of Mac OS X Server v10.6.8 Update Combo v1.1 could update 10.6.3, and after installing Security Update 2013-004 Server (Snow Leopard) or Apple Software Installer Update 1.0, then VMware Tools and all other off-line installers worked OK. I could bypass that by installing Software Installer Update 1.0 via Pacifist (it refused to install because it needed 10.6.8) - after that all installers including the 10.6.8 Update Combo installed OK.Īnother more laborious way was to install Mac OS X Server v10.6.6 Update Combo, Mac OS X Server v10.6.7 Update, Mac OS X Server v10.6.8 Update v1.1 and Security Update 2013-004 Server - after that all installers including VMware Tools installed OK. I could update freshly installed Mac OS X 10.6.3 Server to 10.6.8 via the online Software update control panel just fine.īut many old off-line installers and VMware Tools failed to install due to "installer error". Both 32-bit and 64-bit installs ran OK.ĭon't 32-bit applications run on 32&64-bit systems while 64-bit apps need a 64-bit system? As far as I remember, I could boot Mac mini Late 2009 in either 32- or 64-bit OS X 10.11 (I tested that when Cisco's VPN client didn't work in 64-bit boot anymore but luckily the built-in VPN was very good. dmg updates in case the software update does not work in the future. I have an old Mac OS X 10.6.8 virtual machine on VMware 11 and in the past few days I have tested if I can still make a fresh install in Mojave. A recent MacInTouch thread mentioned OS X 10.8 and 10.11 as other good candidates. ![]() ![]() I might use Mac OS X Server v10.6.8 because as a bonus it is the last system that can run PowerPC applications via its Rosetta emulation. I am experimenting which old Mac OS X version is the best to virtualise 32-bit apps in Catalina in the future (I'm currently using Mojave).
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