Successful deployment of "MacOS Mojo" (Mojave-Optimized, as I label my special-sauce tweak) on one of the earliest/slowest of the non-metal i-series processor machines (i.e., the very popular 2009-2011 "silverback" iMac era, officially supported to High Sierra). Mojave can be placed on even older C2D machines via the dosdude1 patch, but creating a "fully working" installation on the '09-"11 iMac models in particular was troublesome, and requires finessing both the dosdude1 patch and opencore 0.4.3.
Exhaustive procedure:
https://forums.macrumors.com/thread...ed-macs-thread.2121473/page-799#post-34394213
Working: wifi, hardware-acceleration, memory-compression, audio/sound, bluetooth, color palette, dark-mode, brightness slider (in System Preferences > Display).
Not working: (documents have generic icons -- If someone has the solution for this, I think "Mojo" is visually and performatively done, representing a completely cloneable OS capable of booting the entire intel line save Late-2019+ models; supporting these would require Mojo raiding/spoofing 10.15 Catalina, which is beyond my knowledge at present.)
Launch time from chime off a 7200rpm rotational HFS+ primary partition, including the pause for the OCLP bootloader choice screen): about 90 seconds for desktop with all launch-item menubar icons fully displayed.
(Playing three 1080p videos simultaneously, one via YouTube and two as files stored on rotational media), in three different applications (Firefox-dynasty v145 w/half-dozen extensions), Avidemux 2.7.1, VLC 3.0.23) on a "slow" 8gb ram 2010 iMac without caching.)