Prevent Endless Reboot after Updating your Apple Laptop's macOS, especially the macOS High Sierra 10.13 Supplemental Update

If you have a MacBook pro and you want to do the latest update (the small one after high sierra, or "macOS High Sierra 10.13 Supplemental Update"), you should probably

1. backup (e.g., time machine),
2. (important!) connect your laptop with ethernet, and
3. connect to a power source.

My MacBook pro time-jumped to some time in 2016 after the update and it forced itself into a power-cord only endless reboot mode. No kidding! Endless reboot, like you never hear the reboot sound effect so many times.

After the update, it wouldn't start unless it was connected to a power source, but it would reboot a few seconds after that Apple loading progress bar reached around 60% or 90%. My current working hypothesis is that it has to be connected to the internet before it reaches that point. Otherwise, it restarts again before you could quickly choose a WiFi access point and enter the password.

After a few hours trying all the special hotkey combinations suggested on the internet, I solved the problem by connecting it to ethernet, which I believed the connection allowed the update to finish somehow. I then was able to login and change the time back. I am backing up my laptop now.

Comments

Setting MySQL to Use UTF-8 on MAMP (MySQL 5.5.9, or 5+)

I wanted to setup MySQL to use utf-8 on the MAMP installation on my Mac. I tried the instructions from this article: http://cameronyule.com/2008/07/configuring-mysql-to-use-utf-8/ However, I kept getting error messages that are similar to this one [ERROR] /Applications/MAMP/Library/bin/mysqld: unknown variable 'default-collation=utf8_general_ci' I did some search and realized that several variables are deprecated. Reference: http://dev.mysql.com/doc/refman/5.1/en/server-options.html Therefore, I added the following lines into /Applications/MAMP/conf/my.cnf [mysql] character-set-server=utf8 [client] character-set-server=utf8 [mysqld] character-set-server=utf8 collation-server=utf8_general_ci init-connect='SET NAMES utf8' I restarted the server and mysql run successfully with relevant variables being set correctly. In the "Variables" tab under phpMyAdmin interface (ex. http://localhost:8888/MAMP/?language=English) character set c...

ngrok, a service to help you get a public URL for your local webserver

If you are looking for options to test your web app hosted on your own machine (e.g., laptop) remotely with someone, I recommend using a service called ngrok. https://ngrok.com/ It has many usages, but in the context of testing an app hosted on your own machine, the most important part is giving you a public URL that will redirect all the requests to your local webserver (e.g., Apache, Nginx, or whatever server you are running). You can give this URL to a testing participant without the need to host the app on a remote server. For instance, if you are testing your app using a sever on your machine, typically you can access your app in a URL like: http://localhost:3000/?study=11 Using ngrok, you will have a dynamically generated URL like the following: https://3ebe3c019867.ngrok.io/ The service will redirect requests to https://3ebe3c019867.ngrok.io to http://localhost:3000 You can then share the following link with your testing participant for the participant to use your app. http...

How to update multiple fields in an SQL update statement

Syntax: /* the correct way of putting multiple fields together, using comma */ UPDATE `stories` SET `content`='Once upon a time ...', `update_time`=now() WHERE id=1; Note: there is no 'and' between the fields you are trying to update. You should use comma between each pair of the fields you are trying to update. Otherwise, you will likely get an '0' as the result value in the 'content' field without getting any error message. If you do the following, you will likely get an '0' in the 'content' field, without any error message /* the wrong way of putting multiple fields together, using 'and' */ UPDATE `stories` SET `content`='My Story' and `update_time`=now() WHERE id=1; See also: http://stackoverflow.com/a/7375371

Aventurine Yao

Search This Blog