How to install LibreOffice on macOS

Download new version at https://www.libreoffice.org/download/download-libreoffice/

Click the info link ( https://download.documentfoundation.org/libreoffice/stable/25.2.3/mac/aarch64/LibreOffice_25.2.3_MacOS_aarch64.dmg.mirrorlist ) for check sum and signature file

File information

    Filename: LibreOffice_25.2.3_MacOS_aarch64.dmg

    Path: /libreoffice/stable/25.2.3/mac/aarch64/LibreOffice_25.2.3_MacOS_aarch64.dmg

    Size: 279M (292500275 bytes)

    Last modified: Mon, 28 Apr 2025 20:14:40 GMT (Unix time: 1745871280)

    SHA-256 Hash: 309de4092e5e85882a77132a55e891a6eb5f7e1fd28dba2da04bc14bd878003a

    SHA-1 Hash: ee83a63d6e38a17d77a92eb6633a707a06d57aef

    MD5 Hash: 68dc297abed5c1c995464913658d4fa9

    BitTorrent Information Hash: 96fc5aecd8c7d435642f9061e88c68661d81f2de

    PGP signature available

check the file size:

ls -latr LibreOffice_25.2.3_MacOS_aarch64.dmg 

-rw-r--r--@ 1 user1  staff  292500275 May 26 10:38 LibreOffice_25.2.3_MacOS_aarch64.dmg

check the hashsum:

sha256 LibreOffice_25.2.3_MacOS_aarch64.dmg 

SHA256 (LibreOffice_25.2.3_MacOS_aarch64.dmg) = 309de4092e5e85882a77132a55e891a6eb5f7e1fd28dba2da04bc14bd878003a

Download the PGP signature ASC file and check.

$ gpg --verify LibreOffice_25.2.3_MacOS_aarch64.dmg.asc 

gpg: assuming signed data in 'LibreOffice_25.2.3_MacOS_aarch64.dmg'

gpg: Signature made Mon Apr 28 08:55:03 2025 PDT

gpg:                using RSA key C2839ECAD9408FBE9531C3E9F434A1EFAFEEAEA3

gpg: Can't check signature: No public key

$ gpg --keyserver-options auto-key-retrieve --verify LibreOffice_25.2.3_MacOS_aarch64.dmg.asc 

gpg: assuming signed data in 'LibreOffice_25.2.3_MacOS_aarch64.dmg'

gpg: Signature made Mon Apr 28 08:55:03 2025 PDT

gpg:                using RSA key C2839ECAD9408FBE9531C3E9F434A1EFAFEEAEA3

gpg: /Users/v123/.gnupg/trustdb.gpg: trustdb created

gpg: key F434A1EFAFEEAEA3: public key "LibreOffice Build Team (CODE SIGNING KEY) <build@documentfoundation.org>" imported

gpg: Total number processed: 1

gpg:               imported: 1

gpg: Good signature from "LibreOffice Build Team (CODE SIGNING KEY) <build@documentfoundation.org>" [unknown]

gpg: WARNING: This key is not certified with a trusted signature!

gpg:          There is no indication that the signature belongs to the owner.

Primary key fingerprint: C283 9ECA D940 8FBE 9531  C3E9 F434 A1EF AFEE AEA3

How to setup keyboard to type other languages on Mac

Extract from https://support.apple.com/en-vn/guide/mac-help/mchlp1406/mac for reference:

1. On your Mac, choose Apple menu  > System Settings, then click Keyboard  in the sidebar. (You may need to scroll down.)
2. Go to Text Input, then click Edit. 
3. Click the plus sign (located at the end on left corner), then search for a language (such as Chinese, Simplified). Select one or more input sources for each language you want to use. 
4. Click Add.
5. To begin writing in another language, select the language you want to use in the Input menu in the menu bar.

How to validate downloaded VirtualBox 7.0.6 on macOS

https://www.virtualbox.org/wiki/Downloads

SHA256 checksums values retrieved from https://www.virtualbox.org/download/hashes/7.0.6/SHA256SUMS

21c3595361bb2365efe6139f1da724d362daa63fb92c38f686a01aa9200628b2 *Oracle_VM_VirtualBox_Extension_Pack-7.0.6-155176.vbox-extpack

292961aa8723b54f96f89f6d8abf7d8e29259d94b7de831dbffb9ae15d346434 *Oracle_VM_VirtualBox_Extension_Pack-7.0.6.vbox-extpack

292961aa8723b54f96f89f6d8abf7d8e29259d94b7de831dbffb9ae15d346434 *Oracle_VM_VirtualBox_Extension_Pack-7.0.6a-155176.vbox-extpack

54e091d30bdca351a5039c521601bdbf05f7e78e439fda6785eb1fe3084c528d *SDKRef.pdf

8feb54658307920a70c70928b16d2376787e90e874fd8d2ad5261fddea1e121b *UserManual.pdf

21e0f407d2a4f5c286084a70718aa20235ea75969eca0cab6cfab43a3499a010 *VBoxGuestAdditions_7.0.6.iso

5c637c44bf111aa79ed3c08b24e3f52c0af5da8ac2295df5c2eba89c2b951bfb *VirtualBox-7.0-7.0.6_155176_el7-1.x86_64.rpm

962246ae8e4a40a036a70e450afab9bb5010edf94ddf0cdcee8069d8039c203d *VirtualBox-7.0-7.0.6_155176_el8-1.x86_64.rpm

0f68d72d81df76c9a190449447dddf88472be629739cf6bcd1e973dc6149ddfb *VirtualBox-7.0-7.0.6_155176_el9-1.x86_64.rpm

17376cb4c0268582ca6a036654d666fc043cbe2dbce18bbec5ac0b0a755799cc *VirtualBox-7.0-7.0.6_155176_fedora35-1.x86_64.rpm

6c6ed9d6b8f21d8bbc9b6e1b9c92113b1ed623df4636bafade397cccf272f755 *VirtualBox-7.0-7.0.6_155176_fedora36-1.x86_64.rpm

b705fc3f6a0a86f056de1da746da17f83e471e4d6a72472dcd1614b0797f75be *VirtualBox-7.0-7.0.6_155176_openSUSE153-1.x86_64.rpm

caae9dd190d7b427e15efe256e99b4d840a296d78b9e5faa1d1a8d5099301f06 *VirtualBox-7.0.6-155176-Linux_amd64.run

f3d0bd75daaa9beb81c03fe5201fd49a39bd251bedb324e21adbd6ff047898c3 *VirtualBox-7.0.6-155176-OSX.dmg

46cf5c5b8ba81250adb825c35c85e2da63e5119fba264bc0b7f91eab44c4f244 *VirtualBox-7.0.6-155176-Solaris.p5p

93e6f4fce921a5d142afb989237412664038eaaaecb30332975f842e59753275 *VirtualBox-7.0.6-155176-SunOS.tar.gz

a4142ecf52657bd6e06b66573919ac342ef460a61f4ee7d35c235c54640c3a39 *VirtualBox-7.0.6-155176-Win.exe

f146d9a86a35af0abb010e628636fd800cb476cc2ce82f95b0c0ca876e1756ff *VirtualBox-7.0.6.tar.bz2

0f3c380155a2bf8582058b1d7ae073a7fa76f9c1843f7e78c3dfe6cdcefe73bd *VirtualBox-7.0.6_BETA4-155176-macOSArm64.dmg

adf8095a0f4ae1a195de841f0354d1fbae6a2b7b577a4fa1e59c0848ddcf2ae4 *VirtualBoxSDK-7.0.6-155176.zip

a489b56e7812c87c67405d577ab059fe2dcb341810a4ab1f2a1f124f60bfaa10 *virtualbox-7.0_7.0.6-155176~Debian~bullseye_amd64.deb

2270687ca6fa4eb269d5b5752200192f468793b34fde88b2b2debe32f45196a3 *virtualbox-7.0_7.0.6-155176~Debian~buster_amd64.deb

93e150bed07714dfc633154e08ebe35e0b2c0fd84cd10b3361574e18ff76487e *virtualbox-7.0_7.0.6-155176~Ubuntu~bionic_amd64.deb

403d310dde348eba5519a72ea3441f9b04d35a29193d6f84a94a6a43e2cb7459 *virtualbox-7.0_7.0.6-155176~Ubuntu~focal_amd64.deb

5a5a183e8099ce689901084bc8d5dad408c6d442e53a49a73962b54ffc90866c *virtualbox-7.0_7.0.6-155176~Ubuntu~jammy_amd64.deb

$ openssl dgst -sha256 VirtualBox-7.0.6-155176-OSX.dmg

SHA256(VirtualBox-7.0.6-155176-OSX.dmg)= f3d0bd75daaa9beb81c03fe5201fd49a39bd251bedb324e21adbd6ff047898c3

Install only the SHA256 checksum matched

iPhone 14 Pro vs. Galaxy S23 Ultra: Do I Regret Switching to Apple? - CNET

Excerpt from 

https://www.cnet.com/tech/mobile/iphone-14-pro-vs-galaxy-s23-ultra-comparing-camera-battery-as-an-ex-android-user/

… there are advantages to having an iPhone that go beyond specs that'll likely keep me in the Apple ecosystem for a while. Features like Airdrop and iMessage have made the user experience more seamless. And I don't know if I could give up the iPhone's video quality for anything else.

How about you?

How to show emoticon on MacBookPro

With text box on focus, press three keys together ⌃-⌘-Space Bar (Control-Command-Space Bar)

How to verify checksum of a downloaded file on MacOS

$ openssl dgst -sha256 VirtualBox-6.1.2-135662-OSX.dmg

SHA256(VirtualBox-6.1.2-135662-OSX.dmg)=

20fb52bbd7edec58c9eef69046240a809091727872b8b4b254db272ffd6950b4



$ openssl dgst -sha256 Oracle_VM_VirtualBox_Extension_Pack-6.1.2.vbox-extpack

SHA256(Oracle_VM_VirtualBox_Extension_Pack-6.1.2.vbox-extpack)=

54047312d836c17ef0939410f755cb5a23e3037ec402198cc97f755181b25632



Compare result with value in

https://www.virtualbox.org/download/hashes/6.1.2/SHA256SUMS



Reference: https://apple.stackexchange.com/questions/230917/need-a-cli-to-check-the-sha256-hash-of-a-file

Type Vietnamese on Mobile Devices

I like iOS one thing: I can type Vietnamese in iPhone, iPod Touch, iPad quickly without install additional app. Android is not.

For Android version before 4.0, you must install a third party app to type Vietnamese. It's scary. Some apps ask for unnecessary permissions like reading your contact, your account info, your SMS message,... When I installed some trusted apps to type Vietnamese, as a precaution Android warning me for possible security breach like keys log. So I uninstalled them and used the built in Google Keyboard. Since it do not support any popular input method used by Vietnamese like Telex, VNI or VIQR, it's hard to use and slow. For example: To type letter 'ê', I can type ee (Telex type) as in iOS but for Android Google Keyboard, I must hold a letter e to see it displays other characters, select and drag letter 'ê' to an input text box.

I hope Google should catch up with Apple in support Vietnamese input. There are a lot of Vietnamese in the world using Android-based phones and tablets.

Should Microsoft Windows Free?

Few days ago, I read this article "Microsoft should get used to giving Windows away for free" written by  Tony Bradley on TechRepublic. I like that idea. If Microsoft can not make Windows free as Ubuntu Linux, at least it should be free upgrade or low cost like Mac OS/X 10.7

MAC – Easy to Use?

Refresh:

• Windows: F5
• Ubuntu: Ctrl-R
• Mac: ?

Create a new text file.

• Windows: Right click
• Ubuntu: Right click
• Mac: ?

How to Open the HTML File in Plain Text Mode Using TextEdit

Open the HTML file using TextEdit in Mac/OS will render it in the rich text format by defaut. If you would like to view the HTML tags or edit it by typing your own HTML statements, you need to open it in plain text format. To open in plain text form:

1. Click on Preferences
2. Select the Open and Save
3. Click on 'Ignore rich text commands in HTML files

 This is why many developers prefer to use gedit from GNOME as a text editor

Is Windows Phone third place?

Few days ago, I read "Windows Phone:  Surprisingly Easy to Develop For" written by Dino Esposito on April 02, 2012 on Dr. Dobb's

From a consumer's viewpoint, Windows Phone is firmly the third OS by market share at present, following Android and iOS. Some analysts reckon that Windows Phone may be second only to Android by 2015 in a world with only four major mobile platforms left: Android, Windows Phone, iOS, and BlackBerry.

It's not true.

According to comScore report on May 1st, 2012

More than 106 million people in the U.S. owned smartphones during the three months ending in March, up 9 percent versus December. Google Android ranked as the top smartphone platform with 51 percent market share (up 3.7 percentage points). Apple’s share of the smartphone market increased 1.1 percentage points to 30.7 percent. RIM ranked third with 12.3 percent share, followed by Microsoft (3.9 percent) and Symbian (1.4 percent).

Nielsen reported on May 7, 2012

1. Android OS 48.5%
2. iOS 32.0%
3. RIM Blackberry 11.6%
4. Windows Mobile 4.1%
5. Windows Phone 1.7%
6. Other 2.1%

But Microsoft tried to get into the third place in next couple years according to Steve Ballmer, Microsoft CEO:

"I think with a little bit more effort, a little bit more energy, the level of enthusiasm from the customer base is high enough we've just got to kick this thing to the next level. And I think we're in absolute good shape in order to be a very strong third ecosystem in the smart phone world.

(Source:  http://www.theregister.co.uk/2011/09/15/windows_phone_disappoints/)

Automatically Show and Hide Dock Bar on MacBook Pro

By default, the dock bar always show on MacBook Pro. It consume a lot of space on screen. To make it automatically hide and show:

1. Right click the middle space between icon, go to dock preferences.

2. Check automatically hide and show the Dock

or
Click on the Apple icon on the top left screen to access Dock preferences

or really quick: Press <option><command><command>D keys at the same time to turn on/off the automatically hide and show the Dock

Apple iPad 2 vs. Toshiba Thrive vs. Acer Iconia Tab vs. Samsung Galaxy Tab vs. Motorola Xoom

There is no question that Apple iPad 2 is a leading table. Let compare it with other 16GB Wi-Fi tablets.

Tablet	Apple iPad 2	Toshiba Thrive	Acer Iconia Tab A500	Samsung Galaxy Tab	Motorola Xoom Family Edition
Operating System (OS)	Apple iOS 4, 5	Google Android 3.1, 3.2	Google Android 3.1	Google Android 3.1	Google Android 3.1
Screen Size	9.7-inch	10.1-inch	10.1-inch	10.1-inch	10.1-inch
Screen Resolution	1024x768	1280x800	1280x800	1280x800	1280x800
Processor	1GHz dual-core Apple A5	1GHz Dual-core	1GHz Dual-core NVIDIA® Tegra™ 2	1GHz Dual-core NVIDIA® Tegra™ 2	1GHz Dual core
Memory (RAM)	512MB	1GB DDR2	1GB DDR2	1GB	1GB
Storage (ROM)	16/32/64 GB	8/16/32 GB	8/16/32 GB	16 or 32 GB	16GB
Expandable memory	None	Full-size SD Card slot. Up to 128GB SDXC	microSD, microSDHC	None	Up to 32 GB microSD card
Back Camera	1MP. Video recording, HD (720p)	5MP with auto-focus, 720p video capture	5MP with auto focus and single LED flash	3MP auto-focus camera with LED flash. HD(720p) Video recording	5MP auto-focus camera with LED flash. 720p video capture
Front Camera	0.3MP VGA	2MP	2MP	2MP	1.3MP
Microphone	Yes	Yes	Yes		Yes
HDMI	No	Yes	Yes	No	Yes
USB	No	Mini USB 2.0 port, Full-size USB 2.0 port	1 USB 2.0	No	Micro USB
Wi-Fi	802.11a/b/g/n	802.11b/g/n	802.11b/g/n	802.11 a/b/g/n Dual-band (2.4GHz, 5GHz)	802.11b/g/n
Battery	10 hrs	11 hrs	8 hrs	9 hrs	10 hrs
Weight	1.33 lbs	1.60 lbs	1.69 lbs	1.25 lbs	1.43 lbs
Flash support		Yes		Yes	Yes
Price	$500/$600/$700	$380/$400/$480	$350/$450/$500	$500/$600	$400

Steve Jobs

Steve Jobs, the mastermind behind Apple's iPhone, iPad, iPod, iMac and iTunes, passed away on Wednesday, Oct. 5, 2011. Jobs was 56.

Apple said in a statement on its website: "Apple has lost a visionary and creative genius, and the world has lost an amazing human being. Those of us who have been fortunate enough to know and work with Steve have lost a dear friend and an inspiring mentor. Steve leaves behind a company that only he could have built, and his spirit will forever be the foundation of Apple."

Well said, I have nothing to add. But I would like to share "one more thing". One of the things I learn from Steve Jobs in WWDC 1997: “And you know the hardest thing is, when you think about focusing right, you think well focusing is about saying yes. No. Focusing is about saying no. Focusing is about saying no. And you got to say no no no. And when you say no, you piss off people… and the result of that focus, is going to be really great products, where the total is much greater than the sum of the parts.”

Rest In Peace, Steve.