My things

 

File System Size Limits File System type Maximum volume size Maximum file size Supported OSes FAT-8 ? 8 MB FAT-12 16 MB 16 MB FAT-16 ? 16 MB FAT-16B 2 GB 2 GB FAT-32 2 TB 2 GB Operating System File System Size Limits Operating System File System type File System size Notes MS-DOS below 3.0 FAT 16MiB MS-DOS 3.x FAT 32MiB MS-DOS 4.0 FAT 128MiB All FAT 504MiB MS-DOS 5.0 FAT 512MiB All FAT-16 2GiB FAT-16 limit MS-DOS 6.x FAT 8GiB Windows 4.0.950 (95) 32GB Windows 4.0.1111 (95 OSR2) 32GB Windows 4.10.1998 (98) FAT-16 128GB BIOS, for physical computers, also can be a constraint. Windows 4.90.300...

Installed and working Host: Windows 10 64-bits Hypervisor (Type 2): VirtualBox 6.1 (see configuration file below) Guest: Microsoft Windows 4.90.0300 (Millennium) Instructions here . Windows Millennium disc image  here . Boot floppy disk here . Windows serial numbers here . Windows virtual video driver from here . Steps Create a VirtualBox Guest with the following set-up Type: Microsoft Windows Version: Windows ME Memory: From 128MB to 1536MB Hard Disk: From 10GB to 128GB Network: Bridged with PCnet PCI II (Am79C970A) For more details, check the config file code below Mount Guest images Mount floppy to Millennium boot disk (Microsoft Windows ME Setup Disk (OAK).img) Mount optical to  Windows Me (101 - Retail Full).iso Start the installation Start the guest Chose the Window ME iso image When the floppy boot menu appears, chose "Boot from CD-ROM" When the next menu appears, chose "Start Windows Setup from CD-ROM" Press ENTER Chose "Configure unallocated..."  ...

This script sets the VirtualBox macOS guests Serial Number and other stuff to allow a macOS to correctly see the underlying hardware.  All my macOS guests have a name composition to easily identify the type of OS. I could had used the "OS Type", but it is too much work.  This script only sets the serial number for Big Sur guest. The line with  grep "Mac OS X 11."  is used to grab only the macOS 11 guests. #!/bin/bash # https://en.tab-tv.com/?p=18929 # https://github.com/MagerValp/MacModelShelf/blob/master/dump.markdown (Apple Serial Number Product Code) # https://mrmacintosh.com/list-of-mac-boardid-deviceid-model-identifiers-machine-models/ # MacBookPro15,1 (15-inch Mid 2018) Mac-937A206F2EE63C01 # JG5H MacBook Pro (15-inch, 2018) # JG5L MacBook Pro (15-inch, 2018) # JG5M MacBook Pro (15-inch, ...

Installed and working Host platform: Windows 10 64-bits Hypervisor (Type 2): VirtualBox 6.1 (configuration as below) Guest: macOS 10.5.1 (Big Sur) More information here . Package (not ISO) downloaded from  here . (used an old version as basis) Serial number built from here . Board Id from here . VB set-up script  here . <?xml version="1.0"?> <!-- ** DO NOT EDIT THIS FILE. ** If you make changes to this file while any VirtualBox related application ** is running, your changes will be overwritten later, without taking effect. ** Use VBoxManage or the VirtualBox Manager GUI to make changes. --> <VirtualBox xmlns="http://www.virtualbox.org/" version="1.15-windows">   <Machine uuid="{e3cadff1-6bbf-4f14-9538-1885e84924b9}" name="Mac OS X 11.5.1 (Big Sur)" OSType="MacOS_64" snapshotFolder="Snapshots" lastStateChange=...

  Installed and working Idea came from https://www.youtube.com/watch?v=2e29I3dA8o4 Host platform: Microsoft Windows 10 64-bits Hypervisor: VirtualBox 6.1 ReactOS image downloaded from https://reactos.org/. Only the nightly build works.  Full VirtualBox configuration as below For OS only: HDD 4GB For OS and Office packages etc: HDD 10GB For OS, packages and extra space: HDD 20GB <?xml version="1.0"?> <!-- ** DO NOT EDIT THIS FILE. ** If you make changes to this file while any VirtualBox related application ** is running, your changes will be overwritten later, without taking effect. ** Use VBoxManage or the VirtualBox Manager GUI to make changes. --> <VirtualBox xmlns="http://www.virtualbox.org/" version="1.17-windows">   <Machine uuid="{07795fd6-2615-4564-ab5b-b897e1575e64}" name="ReactOS" OSType="Windows2000" snapshotFolder="Snapshots" lastStateChange="2021-07-27T09:00:44Z"...

  Serial number structure Script to set VB data #!/bin/bash # https://en.tab-tv.com/?p=18929 # https://github.com/MagerValp/MacModelShelf/blob/master/dump.markdown (Apple Serial Number Product Code) # https://mrmacintosh.com/list-of-mac-boardid-deviceid-model-identifiers-machine-models/ # MacBookPro15,1 (15-inch Mid 2018) Mac-937A206F2EE63C01 # JG5H MacBook Pro (15-inch, 2018) # JG5L MacBook Pro (15-inch, 2018) # JG5M MacBook Pro (15-inch, 2018) # JGH5 MacBook Pro (15-inch, 2018) # JGH6 MacBook Pro (15-inch, 2018) # JGH7 MacBook Pro (15-inch, 2018) # JGH8 MacBook Pro (15-inch, 2018) sBoardId=Mac-937A206F2EE63C01 sProductCode=JG5M GetVMDetails() {   sKey="$("$...