Apple - XWiki

== Downgrade Big Sur (11.x) to Catalina (10.15) via an 11.x Host Computer ==

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

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##

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[[image:macos-big-sur-terminal-create-bootable-installer.jpg]]

18

11. Eject the installer USB

19

11. Insert the installer USB into the computer and power it on while holding the Option key pressed until the boot selection screen appears:

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11. Select the (working from a VM - look for recovery mode? utilities?)

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[[image:Screenshot 2021-11-03 at 17.30.44.png]]

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11. Use the disk utility to erase the Big Sur drive and then exit disk utility

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11. Install Catalina as normal.

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[[image:Screenshot 2021-11-03 at 17.32.39.png]]

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====== ~[[[top>>doc:WebHome]]] ======

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== Disable MacBook Pro Dedicated GPU ==

Important Notes:

* 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]].

36

* After performing the steps below, sleep mode and brightness control will NOT work properly on your system.

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38

1. First, ensure your machine is completely shut down (You can press Control + Option + Shift + Power keys to reset the SMC).

39

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.

40

1. At this prompt, enter the following command and press Return:

41

##nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00##

42

1. Next, enter reboot, and press Return.

43

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.

44

1. Once booted in Recovery Mode, open Terminal, and run the following command:

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##csrutil disable##

46

1. Reboot the system.

47

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]].

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1. Run the program, follow the prompts, and enter your password when prompted.

49

1. Once the tool finishes running, your system should now run without the dedicated graphics, and should work completely normally.

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51

====== ~[[[top>>doc:WebHome]]] ======

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53

== Essential Keyboard Shortcuts for Mac ==

(% class="min" %)

|=Shortcut|=Action

|**Startup Shortcuts**|

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|C|Boot from Optical Drive

59

|D|Boot to Apple Diagnostics

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|N|Boot from a network server

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|T|Boot in Target Disk Mode

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|Shift|Boot in Safe Mode

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|Cmd + R|Boot to macOS Recovery

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|Option + Cmd + R|Boot to macOS Recovery over the internet

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|Cmd + S|Boot in Single-User Mode

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|Cmd + V|Boot in Verbose Mode

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|Option|Boot to Startup Manager, to pick other startup disks if available

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|Cmd + Option + P + R|Reset NVRAM or PRAM

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|Shift + Control + Option|Reset SMC

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|F12 or trackpad button|Eject removable media

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|Left Shift|Disable automatic login (if enabled)

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|Shift|(at login screen) Prevent Login items / Previous Windows

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|**Global Shortcuts**|

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|Shift + Cmd + 3|Take screenshot of entire screen

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|Shift + Cmd + 4|Take screenshot of selected area

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|Shift + Cmd + 4, then Space|Take screenshot of selected window

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|Cmd + A|Select all

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|Cmd + F|Find

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|Cmd + H|Hide current window

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|Option + Cmd + H|Hide all other windows

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|Cmd + M|Minimize current window

82

|Option + Cmd + M|Minimize all windows

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|Cmd + W|Close current window

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|Option + Cmd + W|Close all windows

|Cmd + O|Open

|Cmd + P|Print

|Cmd + S|Save

|Cmd + C|Copy

|Cmd + V|Paste (copy)

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|Option + Cmd + V|Paste (cut) i.e. move copied item to current location

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|Shift + Option + Cmd + V|Paste and match style

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|Cmd + Z|Undo

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|Cmd + ?|Help

94

|Cmd + , (Comma)|Open Preferences for current app

95

|Cmd + Space|Open Spotlight search

96

|Cmd + Tab|Switch to the next open app

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|Cmd + ~~ (Tilde)|Switch to the next window in the current app

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|Control + Cmd + Q|Lock the screen

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|Shift + Cmd + Q|Log out

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|Option + Shift + Cmd + Q|Log out instantly

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|Cmd + Option + Esc|Force quit

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|Cmd + Option + Eject|Activate Sleep mode

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|Shift + Control + Eject|Put display(s) to sleep

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|Cmd + Control + Eject|Quit all apps and restart

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|Control + Eject|Choose from Sleep, Restart, and Shutdown options

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|**Finder Shortcuts**|

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|Enter|Rename selected file or folder

108

|Space|Open preview of selected file

109

|Option + Space|Open preview of selected file in fullscreen mode

110

|Shift + Cmd + G|Go to folder...

111

|Shift + Cmd + N|Create new folder

112

|Shift + Cmd + Delete|Empty the Trash folder

113

|Option + Shift + Cmd + Delete|Empty the Trash folder immediately

|Cmd + 1|Icon View

|Cmd + 2|List View

|Cmd + 3|Column View

|Cmd + D|Duplicate selected file or folder

118

|Cmd + I|Get info

119

|Cmd + J|View options

120

|Cmd + N|Open new Finder window

121

|Cmd + T|Open new Finder tab

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|Cmd + [|Back

123

|Cmd + ]|Forward

124

|Cmd + Delete|Move selected item(s) to Trash

125

|Cmd + Up|Move up one folder

126

|Cmd + Down|Move down one folder

127

|Cmd + Option + I|Show Attributes Inspector

128

|Cmd + Control + N|With files selected, create a new folder and immediately move selected files into that folder

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====== ~[[[top>>doc:WebHome]]] ======

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132

== Xcode Developer Tools ==

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[[https:~~/~~/developer.apple.com/download/all/>>https://developer.apple.com/download/all/]]

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[[https:~~/~~/en.wikipedia.org/wiki/Xcode>>https://en.wikipedia.org/wiki/Xcode]]

=== 10.12 Sierra ===

* 9.2

** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_9.2/Xcode_9.2.xip]]

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** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_macOS_10.12_for_Xcode_9.2/Command_Line_Tools_macOS_10.12_for_Xcode_9.2.dmg]]

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=== 10.15 Catalina ===

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* 11.5

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** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_11.5/Xcode_11.5.xip]]

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** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_11.5/Command_Line_Tools_for_Xcode_11.5.dmg]]

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* 12.3

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** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_12.3/Xcode_12.3.xip]]

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** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_12.3/Command_Line_Tools_for_Xcode_12.3.dmg]]

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* 12.4

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** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_12.4/Xcode_12.4.xip]]

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** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_12.4/Command_Line_Tools_for_Xcode_12.4.dmg]]

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====== ~[[[top>>doc:WebHome]]] ======

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author	version	line-number	content
		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]]
		18	11. Eject the installer USB
		19	11. Insert the installer USB into the computer and power it on while holding the Option key pressed until the boot selection screen appears:
		20	<screenshot>
		21	11. Select the (working from a VM - look for recovery mode? utilities?)
		22	[[image:Screenshot 2021-11-03 at 17.30.44.png]]
		23
		24	11. Use the disk utility to erase the Big Sur drive and then exit disk utility
		25	11. Install Catalina as normal.
		26	[[image:Screenshot 2021-11-03 at 17.32.39.png]]
		27
		28	====== ~[[[top>>doc:WebHome]]] ======
		29
		30	== Disable MacBook Pro Dedicated GPU ==
		31
		32
		33	Important Notes:
		34
		35	* 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]].
		36	* After performing the steps below, sleep mode and brightness control will NOT work properly on your system.
		37
		38	1. First, ensure your machine is completely shut down (You can press Control + Option + Shift + Power keys to reset the SMC).
		39	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.
		40	1. At this prompt, enter the following command and press Return:
		41	##nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00##
		42	1. Next, enter reboot, and press Return.
		43	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.
		44	1. Once booted in Recovery Mode, open Terminal, and run the following command:
		45	##csrutil disable##
		46	1. Reboot the system.
		47	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]].
		48	1. Run the program, follow the prompts, and enter your password when prompted.
		49	1. Once the tool finishes running, your system should now run without the dedicated graphics, and should work completely normally.
		50
		51	====== ~[[[top>>doc:WebHome]]] ======
		52
		53	== Essential Keyboard Shortcuts for Mac ==
		54
		55	(% class="min" %)
		56	\|=Shortcut\|=Action
		57	\|Startup Shortcuts\|
		58	\|C\|Boot from Optical Drive
		59	\|D\|Boot to Apple Diagnostics
		60	\|N\|Boot from a network server
		61	\|T\|Boot in Target Disk Mode
		62	\|Shift\|Boot in Safe Mode
		63	\|Cmd + R\|Boot to macOS Recovery
		64	\|Option + Cmd + R\|Boot to macOS Recovery over the internet
		65	\|Cmd + S\|Boot in Single-User Mode
		66	\|Cmd + V\|Boot in Verbose Mode
		67	\|Option\|Boot to Startup Manager, to pick other startup disks if available
		68	\|Cmd + Option + P + R\|Reset NVRAM or PRAM
		69	\|Shift + Control + Option\|Reset SMC
		70	\|F12 or trackpad button\|Eject removable media
		71	\|Left Shift\|Disable automatic login (if enabled)
		72	\|Shift\|(at login screen) Prevent Login items / Previous Windows
		73	\|Global Shortcuts\|
		74	\|Shift + Cmd + 3\|Take screenshot of entire screen
		75	\|Shift + Cmd + 4\|Take screenshot of selected area
		76	\|Shift + Cmd + 4, then Space\|Take screenshot of selected window
		77	\|Cmd + A\|Select all
		78	\|Cmd + F\|Find
		79	\|Cmd + H\|Hide current window
		80	\|Option + Cmd + H\|Hide all other windows
		81	\|Cmd + M\|Minimize current window
		82	\|Option + Cmd + M\|Minimize all windows
		83	\|Cmd + W\|Close current window
		84	\|Option + Cmd + W\|Close all windows
		85	\|Cmd + O\|Open
		86	\|Cmd + P\|Print
		87	\|Cmd + S\|Save
		88	\|Cmd + C\|Copy
		89	\|Cmd + V\|Paste (copy)
		90	\|Option + Cmd + V\|Paste (cut) i.e. move copied item to current location
		91	\|Shift + Option + Cmd + V\|Paste and match style
		92	\|Cmd + Z\|Undo
		93	\|Cmd + ?\|Help
		94	\|Cmd + , (Comma)\|Open Preferences for current app
		95	\|Cmd + Space\|Open Spotlight search
		96	\|Cmd + Tab\|Switch to the next open app
		97	\|Cmd + ~~ (Tilde)\|Switch to the next window in the current app
		98	\|Control + Cmd + Q\|Lock the screen
		99	\|Shift + Cmd + Q\|Log out
		100	\|Option + Shift + Cmd + Q\|Log out instantly
		101	\|Cmd + Option + Esc\|Force quit
		102	\|Cmd + Option + Eject\|Activate Sleep mode
		103	\|Shift + Control + Eject\|Put display(s) to sleep
		104	\|Cmd + Control + Eject\|Quit all apps and restart
		105	\|Control + Eject\|Choose from Sleep, Restart, and Shutdown options
		106	\|Finder Shortcuts\|
		107	\|Enter\|Rename selected file or folder
		108	\|Space\|Open preview of selected file
		109	\|Option + Space\|Open preview of selected file in fullscreen mode
		110	\|Shift + Cmd + G\|Go to folder...
		111	\|Shift + Cmd + N\|Create new folder
		112	\|Shift + Cmd + Delete\|Empty the Trash folder
		113	\|Option + Shift + Cmd + Delete\|Empty the Trash folder immediately
		114	\|Cmd + 1\|Icon View
		115	\|Cmd + 2\|List View
		116	\|Cmd + 3\|Column View
		117	\|Cmd + D\|Duplicate selected file or folder
		118	\|Cmd + I\|Get info
		119	\|Cmd + J\|View options
		120	\|Cmd + N\|Open new Finder window
		121	\|Cmd + T\|Open new Finder tab
		122	\|Cmd + [\|Back
		123	\|Cmd + ]\|Forward
		124	\|Cmd + Delete\|Move selected item(s) to Trash
		125	\|Cmd + Up\|Move up one folder
		126	\|Cmd + Down\|Move down one folder
		127	\|Cmd + Option + I\|Show Attributes Inspector
		128	\|Cmd + Control + N\|With files selected, create a new folder and immediately move selected files into that folder
		129
		130	====== ~[[[top>>doc:WebHome]]] ======
		131
		132	== Xcode Developer Tools ==
		133
		134	[[https:~~/~~/developer.apple.com/download/all/>>https://developer.apple.com/download/all/]]
		135
		136	[[https:~~/~~/en.wikipedia.org/wiki/Xcode>>https://en.wikipedia.org/wiki/Xcode]]
		137
		138	=== 10.12 Sierra ===
		139
		140	* 9.2
		141	** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_9.2/Xcode_9.2.xip]]
		142	** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_macOS_10.12_for_Xcode_9.2/Command_Line_Tools_macOS_10.12_for_Xcode_9.2.dmg]]
		143
		144	=== 10.15 Catalina ===
		145
		146	* 11.5
		147	** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_11.5/Xcode_11.5.xip]]
		148	** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_11.5/Command_Line_Tools_for_Xcode_11.5.dmg]]
		149	* 12.3
		150	** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_12.3/Xcode_12.3.xip]]
		151	** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_12.3/Command_Line_Tools_for_Xcode_12.3.dmg]]
		152	* 12.4
		153	** [[Xcode>>https://download.developer.apple.com/Developer_Tools/Xcode_12.4/Xcode_12.4.xip]]
		154	** [[Xcode Command Line Tools>>https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_12.4/Command_Line_Tools_for_Xcode_12.4.dmg]]
		155
		156	====== ~[[[top>>doc:WebHome]]] ======