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Version 8.2 by Drunk Monkey on 2021-11-03 08:51
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1 {{box cssClass="box floatinginfobox" title="**Quick Links**"}}
2 {{toc start="2" depth="5" numbered="true"/}}
3 {{/box}}
4
5 == Downgrade Big Sur (11.x) to Catalina (10.15) via an 11.x Host Computer ==
6
7 {{warning}}
8 These instructions will completely erase the files on computer you are installing to with no chance of recovery. Make sure you have backed up and saved everything you need before you start this process.
9
10 We will also use and erase the USB drive we will use to create the install media. Again, make sure it doesn't contain anything valuable before you start.
11 {{/warning}}
12
13 1. Start with a 16GB USB drive. This USB will be erased. In our example, the USB is labelled "MyVolume"
14 1. Download the Catalina installer for 10.15 ( [[https:~~/~~/support.apple.com/en-in/HT201372>>https://support.apple.com/en-in/HT201372]] ) from the apple app store (8GB). After downloading, the OS will try to run the installer and fail giving an error message. Just dismiss the dialog window and continue on.
15 1. Run "createinstallmedia" via the terminal window to create the installer:
16 11. ##sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia ~-~-volume /Volumes/MyVolume##
17 [[image:macos-big-sur-terminal-create-bootable-installer.jpg||height="50%" width="50%"]]
18
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20
21 == Disable MacBook Pro Dedicated GPU ==
22
23
24 Important Notes:
25
26 * I have recently come up with a MUCH better, PERMANENT solution to this issue, which I'd recommend using instead, if your AMD GPU has failed. This method will also allow brightness control and sleep mode to continue working as normal. More info can be found [[here>>url:https://doslabelectronics.com/Demux]].
27 * After performing the steps below, sleep mode and brightness control will NOT work properly on your system.
28
29 1. First, ensure your machine is completely shut down (You can press Control + Option + Shift + Power keys to reset the SMC).
30 1. Now, boot your machine while holding the Command + S keys. As the system boots, it should display white text on a black screen, and should eventually stop at a prompt.
31 1. At this prompt, enter the following command and press Return: 
32 ##nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00##
33 1. Next, enter reboot,  and press Return.
34 1. Immediately after running the reboot command, hold down Command + R (if you're running OS X 10.11 or later) to boot into Recovery Mode. If you don't have a Recovery Partition, you can boot from a Mac OS installer USB drive.
35 1. Once booted in Recovery Mode, open Terminal, and run the following command:
36 ##csrutil disable##
37 1. Reboot the system.
38 1. Once the system reboots, it should now successfully boot into your install of OS X. Now, you'll need to download the program found [[here>>url:http://dosdude1.com/apps/MacBook%20Pro%20dGPU%20Disabler.zip]].
39 1. Run the program, follow the prompts, and enter your password when prompted.
40 1. Once the tool finishes running, your system should now run without the dedicated graphics, and should work completely normally.
41
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43
44 == Essential Keyboard Shortcuts for Mac ==
45
46 (% class="min" %)
47 |=Shortcut|=Action
48 |**Startup Shortcuts**|
49 |C|Boot from Optical Drive
50 |D|Boot to Apple Diagnostics
51 |N|Boot from a network server
52 |T|Boot in Target Disk Mode
53 |Shift|Boot in Safe Mode
54 |Cmd + R|Boot to macOS Recovery
55 |Option + Cmd + R|Boot to macOS Recovery over the internet
56 |Cmd + S|Boot in Single-User Mode
57 |Cmd + V|Boot in Verbose Mode
58 |Option|Boot to Startup Manager, to pick other startup disks if available
59 |Cmd + Option + P + R|Reset NVRAM or PRAM
60 |Shift + Control + Option|Reset SMC
61 |F12 or trackpad button|Eject removable media
62 |Left Shift|Disable automatic login (if enabled)
63 |Shift|(at login screen) Prevent Login items / Previous Windows
64 |**Global Shortcuts**|
65 |Shift + Cmd + 3|Take screenshot of entire screen
66 |Shift + Cmd + 4|Take screenshot of selected area
67 |Shift + Cmd + 4, then Space|Take screenshot of selected window
68 |Cmd + A|Select all
69 |Cmd + F|Find
70 |Cmd + H|Hide current window
71 |Option + Cmd + H|Hide all other windows
72 |Cmd + M|Minimize current window
73 |Option + Cmd + M|Minimize all windows
74 |Cmd + W|Close current window
75 |Option + Cmd + W|Close all windows
76 |Cmd + O|Open
77 |Cmd + P|Print
78 |Cmd + S|Save
79 |Cmd + C|Copy
80 |Cmd + V|Paste (copy)
81 |Option + Cmd + V|Paste (cut) i.e. move copied item to current location
82 |Shift + Option + Cmd + V|Paste and match style
83 |Cmd + Z|Undo
84 |Cmd + ?|Help
85 |Cmd + , (Comma)|Open Preferences for current app
86 |Cmd + Space|Open Spotlight search
87 |Cmd + Tab|Switch to the next open app
88 |Cmd + ~~ (Tilde)|Switch to the next window in the current app
89 |Control + Cmd + Q|Lock the screen
90 |Shift + Cmd + Q|Log out
91 |Option + Shift + Cmd + Q|Log out instantly
92 |Cmd + Option + Esc|Force quit
93 |Cmd + Option + Eject|Activate Sleep mode
94 |Shift + Control + Eject|Put display(s) to sleep
95 |Cmd + Control + Eject|Quit all apps and restart
96 |Control + Eject|Choose from Sleep, Restart, and Shutdown options
97 |**Finder Shortcuts**|
98 |Enter|Rename selected file or folder
99 |Space|Open preview of selected file
100 |Option + Space|Open preview of selected file in fullscreen mode
101 |Shift + Cmd + G|Go to folder...
102 |Shift + Cmd + N|Create new folder
103 |Shift + Cmd + Delete|Empty the Trash folder
104 |Option + Shift + Cmd + Delete|Empty the Trash folder immediately
105 |Cmd + 1|Icon View
106 |Cmd + 2|List View
107 |Cmd + 3|Column View
108 |Cmd + D|Duplicate selected file or folder
109 |Cmd + I|Get info
110 |Cmd + J|View options
111 |Cmd + N|Open new Finder window
112 |Cmd + T|Open new Finder tab
113 |Cmd + [|Back
114 |Cmd + ]|Forward
115 |Cmd + Delete|Move selected item(s) to Trash
116 |Cmd + Up|Move up one folder
117 |Cmd + Down|Move down one folder
118 |Cmd + Option + I|Show Attributes Inspector
119 |Cmd + Control + N|With files selected, create a new folder and immediately move selected files into that folder
120
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