Dual boot Apple OS

Install Windows 10 on Your Mac

In the steps below, we'll use Boot Camp Assistant to create a bootable USB drive and install Windows 10 on a new partition. Then you'll be able to choose which OS you want to use whenever you start the Mac up.

1. Download the Windows 10 ISO disk image from Microsoft using this link. Choose the 64-bit version of Windows. Also, some people, including myself, have gotten an error message if the ISO image is saved to your default Downloads folder, so save the ISO image to your Documents folder or somewhere else to avoid problems.

2. Open Boot Camp Assistant. You'll find this in the Utilities folder or you can hit CMD + Spacebar to search for "Boot Camp Assistant."




For the rest:  http://www.laptopmag.com/articles/dual-boot-windows-os-x-mac

Apple OS on USB drive

Apple has included a terminal command that can create an install disk for you. Assuming that you have the macOS Sierra installer in your Applications folder and you have a Mac OS Extended (Journaled)-formatted USB drive named "Untitled" mounted on the system, you can create a Sierra install drive by typing the following command into the Terminal.

sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app --nointeraction


The command will erase the disk and copy the install files over. Give it some time, and your volume will soon be loaded up with not just the macOS installer but also an external recovery partition that may come in handy if your hard drive dies and you're away from an Internet connection.


http://arstechnica.com/gadgets/2016/09/how-to-make-your-own-bootable-macos-10-12-sierra-usb-install-drive/

SSL testing for web server

Here is a tool for testing SSL certificates on web servers   https://www.ssllabs.com/ssltest/analyze.html

Using gmail as default email client - Apple OS

Need to set mail to open google mail:  (also see stackexchange)




This only means email will open by default in another email client. If you want mailto: links to open in Gmail on Safari or Chrome or any other browser, however, then doing this won’t work. You actually have to cut out Mail altogether and make the changes to the browser itself.
On Chrome, it’s incredibly easy to default open mailto: links in Gmail. You can simply open a Gmail window and click on the gray double diamonds next to the bookmark star. Out pops a dialog asking if you want to allow, deny, or ignore. If you choose “allow” or “deny” then either way, you’re set.

If you later change your mind, such as if you realize you do want to open mailto: links in Gmail, then you can change it. Type “chrome://settings/handlers” in the location bar and choose (or remove) gmail as your mail handler.

If you use Firefox, it’s also easy. Open the preferences (“Command + ,”) and click the “Applications” tab. Scroll through the “Content Type” until you find “mailto” and then choose your default “Action” from the right column.



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