System Data is the tally of the contents of the /Library, /System and ~/Library and /usr. I commented on both of these but I figured it'd be smarter just to actually make a blog post about this. Why this difference is so large or why this difference even exists at all is not explained. One user might have "System Data" that is is only 10 GB and another might have 250 GB. This isn't because these individuals are incapable, rather that Apple does not clearly communicate what is happening nor give you any meaningful course of action. editing cache data but thats not it this time and I can't figure it out)". I see pretty frequently posts on Reddit posts like " Can someone please explain how to get rid of the "sYsTeM dAtA" this?" or hyper verbose " Why do I have 130 gigs of system data □ (and how do I get rid of it cause a normal mac barely has like a 20 gigs or so of system memory) (I checked the usual culprit i.e. The one point of contention is "System Data," as it's ominous and nebulous. Clicking on Manage will give you a more detailed view. Most users are probably familiar with using About this Mac -> Storage. MacOS is pretty great and bad at the same time, communicating how and what is taking up storage on one's Mac. Reclaiming storage/space from 'System Data' in macOS: A tutorial on understanding the System Data usage. Perhaps we will see a community solution for the ROM now that we know it's possible. While currently this is only avaliable in Europe, this news should make all Mac Pro owners excited as it means there's just a few more drops left in the tank for the classic Mac Pros. Side Note: This will likely change with technologies like DirectStorage in Windows, where the GPU can bypass the CPU for accessing NVMe but for now, there's not a huge advantage for larger PCIe buses when concerning GPUs. This checks out as PCIe 2.0 vs 3.0 generally only incurs about 5% hit for PCIe 3.0 GPUs as GPUs aren't as bandwidth-intensive as most people assume they are. They are about 6% slower in the Metal scores for a 6800 vs a 2019 Mac Pro with the same GPU. Third and final, the benchmarks pass the "sniff test". Second, thanks to community research, we know (at least part of) the scope of the problem for these GPUs. Even if the in the US has a negative reputation for customer service, plenty of people can attest their products work. The MacVidCards group(s) have shipped working EFI hacked GPUs for years. I have to stress that I haven't had any firm confirmations that these are real, but I'd most likely wager they are.įirst, it's coming from a reliable source. My guess is that figured out how to do this and is now selling these GPUs. Synchretic theorized patching this error in the ROM on the GPU would allow the boot sequence to continue, and thus you could use the GPU. When the GPU hit the unexpected null state, it'd hang, thus interrupting the boot process. Thus the ROM on the card would look for these settings, and it'd fail to return a value. Apple's EFI implementation does not have UEFI HII support. During the init, the ROM checked for UEFI HII (Human Interface Infrastructure) protocols but didn't have any error handling. Syncretic of the SurPlus fame had a look at the ROMs found on the 6000 series AMD GPUs and postulated it was due to bad code on the ROM. I'm inclined to believe these are real, and here's why. MacVidCards.Eu is now selling flashed 6600 XTs and 6800 XTs for classic Mac Pros with screenshots to back up the claim. had some business arrangement with, as didn't ship to Europe. It would flash GPUs with its custom hacked ROMs for a fee. offered an alternative for aftermarket GPU upgrades. It can inject the low-level driver support, thus giving classic Mac Pro users a boot screen, among many other features. OpenCore is a boot loader, meaning it launches before the operating system and has the ability to perform functions before the OS is loaded. This meant for years, Mac users who bought any sort of non-OEM GPUs did not display a boot screen until OpenCore. The more modern UEFI replaced UGA with Graphics Output Protocol (GOP) Thus, any UEFI GPU will not output video before drivers are loaded. Apple's implementation uses Universal Graphics Adapter Protocol (UGA). The Mac Pros EFI implementation predates UEFI, the Unified Extensible Firmware Interface, which replaced BIOS computers. In my excitement and haste to post a video, I incorrectly stated that it's a RX 6800 XT and not a 6800.
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