I went ahead, in February 2024, and committed to installing (and keeping) Mojave on one of my systems. No, Siliconfans, spare us the lecture.
View attachment 2346997
Unlike the last time I bothered with Mojave (on my A1502 whose retina display failed catastrophically), this time I needed to rely on dosdude1’s Mojave patcher.
Minus a couple of tiny hiccups, like having no audio initially (resolved after the patcher updates and security updates finished installing), everything, hardware system-wise, seems to be in working order. As with my
very recent tweak of memory allotment for the Intel Graphics HD 3000 iGPU, it took a few kextcache rebuilds to get the system to finally accept and settle into the 1024MB alteration. One sign that the system is on its way there is the GPU memory use in iStat Menus will, temporarily, show 200+ per cent usage. After the kextcache rebuild, it settles down after reboot to about 12.5 per cent:
View attachment 2347003
For comparison: in High Sierra, initial usage demand was a negligible tick lower, at 10–12 per cent.
So now my venerable, late 2011 A1278 (so venerated because of the ironclad, perfectly tweaked build of 10.6.8 on one of its two SSDs and also the stability of the Sandy Bridge architecture) gets to try out things in end-of-line 32-bit application land.
Pluses
- The system works. It seems no faster or slower than High Sierra.
Neither plus nor minus
- Non-Metal rendering tweaks are a bit… odd to see. Namely, there’s a hairline border around windows and modals. This happens regardless whether Light or Dark mode is selected.
View attachment 2347014View attachment 2347077
It’s not irksome to see, just a bit jarring and will take some adjustment.
The ability to fine-tune what I want to see in Dark or Light mode is alleviated somewhat with utilities like TinkerTool 7, which enables one to exclude certain system applications — Finder, Terminal, etc. — from using Dark mode (Dock, unfortunately, isn’t one of them).
For now, I find all-Dark mode on everything to be, at least at this time, too stark a shift. I do, however, prefer a dark menubar, so having that available is nice. Unlike my Metal-native, late 2013 iMac, the menubar in High Sierra on the A1261 and, prior to today’s upgrade, the A1278, doesn’t go into Dark mode after sunset, so having that on the A1278, even if it’s always Dark, day or night, is nice.
Minuses
- This is a giant one: iTunes 10.6.3 will not launch. When I ran Mojave, briefly, in 2020, on the A1502, I used some kind of tweak I managed to find at the time to get it to run in Mojave.
For the life of me, I cannot remember what that was or any other references locally on where I found that tweak. Initially, I thought this was my imagination — that Mojave never ran iTunes 10.6.3 for me, much less anyone else, except at least one other user on here named @Partron22 had success doing the same. I already tried the alteration of the Info.plist within iTunes to spoof a later major version, but to no avail. Interestingly enough, that linked testimonial by that long-gone user also ran iTunes 10.4.1 in Mojave successfully.
This is noteworthy to me because iTunes 10.4.1 is the very last version of iTunes to launch and run on Build 10A96 of Snow Leopard on PowerPC.
So if anyone might, from memory, recall what tweak needs to happen for Mojave to not reject the launching of iTunes 10.x, I would be delighted and, this time will bookmark it for posterity. 
- Finder sidebar shenanigans. As with every iteration of Mac OS X/macOS after Snow Leopard, Apple are always futzing with the sidebar. Although I always bear this in mind, especially as Apple let slide UI/UX/HID consistency over the last several years (and making it more hostile to use for eyes and minds who use colour within UI icons as a key signifier), I also avoiding giving their constant changes much thought with more recent builds. Why? Well, I have very low interest in those builds, and I choose not to use them.
So to have network servers lose their own sub-section in Mojave is a disappointment. First example below is from one of my High Sierra boxes. I have it set up to show Devices (which, a Sierra/High Sierra annoyance, possibly one going back to Mavericks, idr, no longer shows network-mounted volumes under Devices or anywhere in the sidebar, not even after when one manually drags a mounted network volume there), followed by Shared (detected computers on the local network), and “Favorites” (oh, ’Murica).
In Mojave, second example below, shared gets crowded in with Devices, now named Locations
. And when a local network device is reporting to the network as being online, Mojave won’t show it:
View attachment 2347010View attachment 2347013
Lastly, the Tags section, the last to appear in the sidebar, can’t be shut off entirely in Mojave. Although in Finder prefs one can semi-deselect “Recent Tags”, it isn’t a true de-selection of Tags entirely. So yah, if there were ways to tweak the Finder sidebar to one’s satisfaction, that would be nice. As it is, I don’t know of one for Mojave or for any other build of macOS.
So that’s my initial take on finally, you know, going there and doing this upgrade, starting it last night and coming back to it today when I had some down time.
If the anxiety escalates after discovering a certain application simply won’t launch, I can always fall back to booting in Snow Leopard. I really was happy, relatively so, with High Sierra, as much as I could be with any post-SL build. I’ll see how well I adjust to Mojave some five-and-a-half years after the early adopters (you know, the ones who are blithely happy with wherever the Apple current sends them and their money). The iTunes thing, however, is going to make me cranky if I can’t find that workaround I found before.