The following are the system requirements for installing the JDK and the JRE on macOS:

Any Intel-based computer running macOS.
Administrator privileges.
You cannot install Java for a single user. Installing the JDK and JRE on macOS is performed on a systemwide basis for all users. Administrator privileges are required to install the JDK and JRE on macOS.
When you install the JDK, it also installs the JRE. However, the system will not replace the current JRE with a lower version.
To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.
When you install the JRE, you can install only one JRE on your system at a time. The system will not install a JRE that has an earlier version than the current version.
To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.
Note:
Installing a JRE from Oracle will not update java -version symlinks or add java to your path. To do this, you must install the JDK.

Install Programs from DMG Files on Mac. Open the DMG File. You can open the DMG file by double clicks or Disk Image Mounter feature (from the sub-menu of Open With) in its right-click menu. Or you can use Attach feature of iSunshare BitLocker Genius to access the DMG file. Tips: iSunshare BitLocker Genius also has the powerful BitLocker decryption feature which can make you unlock the BitLocker drive on your Mac easily. Jan 19, 2018 How to Install Mac Software. Double-click the application file you've downloaded from the Internet. If you get an error message that says the program 'can't be opened. Follow the instructions. Drag the application to the Applications folder. Most.pkg files will do all the work for.

May 08, 2011 Mac Tutorial: Installing software from DMG disk images. How to install software that comes in a DMG disk image. How to restore OS X MacBook Pro in new Hard drive - Duration. A DMG file is essentially Apple's format for mountable disk images in Mac OS X (macOS) computers. When opened, it mounts a virtual disk on the computer, and is normally used for installing new applications. DMG file is usually encrypted and compressed, unlike ISO, which is an uncompressed disk image format. A DMG file, like ISO, can be used to install macOS operating system or Mac apps. If the Mac computer was broken or crashed and couln't get into the system, but you only have access to a Windows PC, there's still a way to make a bootable macOS install USB on Windows.

Mac OS Leopard 10.5 is the sixth release by Mac OS for Apple’s desktop and server operating system for Macintosh computers. It is available in two editions: for desktop or personal computers and server version (Mac OS X Server). The retail price for the desktop version is $129 and $499 for the server version. It was released on October 26, 2007.

This is the final version of Mac OS X which can support the PowerPC structure as snow leopard function only on Intel-based Macs. The latest released is 10.5.8 (Build 9L31a) on August 13, 2009. Its kernel type is hybrid (XNU). This version is preceded by Mac OS X 10.4 Tiger and succeeded by Mac OS X snow leopard. It is the first operating system that has open-source BSD to be certified as fully UNIX cooperative.

Download: Mac OS X Snow Leopard 10.6 ISO and DMG file

License
Official Installer

File Size
7.8GB

Language
English

Developer
Apple Inc.

Tutorials: How to Clean Install Mac OS using a USB drive on Mac

New Features Added to Mac OS X Leopard 10.5

This new Mac OS Leopard 10.5 ISO comes with many new features like:

An improved Automator is introduced. It can create and edit work with the new interface. A new feature ‘watch me do’ is introduced that record user action and reply as an action in a work. It can create more useful work with action for RSS feed, PDF manipulation and much more.

It has the feature to access a file on their computer while far from home through the internet.
It has a new group feature called stack which displays a file in a ‘fan’ style, ‘grid’ style and a ‘list’ style.
It has redesign 3D dock.
New dictionary in Japanese is introduced.
The front row has been updated which closely resembles the interface of original Apple TV.
Safari 3 is introduced which includes web clip.
This version of Mac comes with an interesting feature called time machine. It allows the user to back up the deleted or replaced by another version of the file. Time machine does not make bootable copies of backed up the volume, it does not backup encrypted FileVault home dictionary until the user logout. It also does not back up to Airport Disc hard drives but this issue is been resolved on March 19, 2008 update.
It doesn’t the support classic application.
It comes with a total of 18 languages.
It comes with Alexa voice to voice over and the Apple company assured that it is the most natural and understandable voice yet.
A quick look is available which allows us to view the document without opening them in external software.
An updated version of photo booth is introduced which allow us, user, to record video with real-time filter and blue/ green screen technology.
It offers Objective-C 2.0 runtime, which has new features such as garbage collection

System requirements for this new version for Mac OS

To enjoy this version of Mac OS X, there are some basic requirements for a system like:

If we are talking about the processor then we need an Intel processor or PowerPC of G5 or G4 (867 MHz and faster).

The DVD drive, internal or external for installation of the operating system.
Minimum of 512MB of RAM is required for the proper functioning of the system. Additional of 1Gb of is recommended for development purpose.
Minimum of 9 GB of the disc is required.

These are the features required for the general purpose.

For some features specific requirements in the Mac are :

Time machine application needs an additional hard drive.
For boot camp, a Mac with Intel processor and Windows XP service pack 2 or Windows Vista is required.
1.8GHz PowerPC G5 is required for the DVD player for improved de-interlacing.
An insight camera (external or built-in), USB video class camera or Firewire DV camcorder, an Intel or PowerPC G5 processor is required for the photo booth.
Audio chats required microphone and 56kbs speed of internet connection.

Technical details of Mac leopard 10.5

Filename:- osx_leopard_10.5_install.iso
File size :- 7.8 GB
Developer:- Apple

To get this latest version of Mac

If we set our mind to upgrade our Mac with latest features then we have to upgrade our pc with Leopard 10.5. The ISO file is available on the official website as well as on the apple store. We have to decide what type of installation we require because it comes with three types of installation: Upgrade, Archive and Install, Erase and install.

Archive and install take the middle ground method. This installer moves all your data in one folder and then create a clean installation of OS X 10.5 Leopard. This method allows the user to get all their existing data including the user account. Installation of Leopard OS in the Mac, you have to boot from the Leopard install DVD.

Installation process step by step:

First, we have to insert the OS X Leopard install DVD into Mac DVD drive.
After that an install Mac OS X on display on the screen and we have to double click it.
Click the restart button when the install Mac OS X open.
Enter the administrator password and press the OK button.
Mac will restart and boot from the installation DVD. Restarting from the DVD take some time, so be patient.

How To Get Mac OS Leopard on your Mac

Snow leopard comes with no option other than upgrade, but with few extra steps, we can perform erase and install. The ISO file is available at the Apple official website and also on apple store. For installation, there are

Install Dmg File On Macbook