Hello, Alien! Mac OS
I am back after having ironed out some of the crinkles left in the design and fixed some internal links, anyway back on track, today I would like to talk about programming on Mac OS X using the x86 (80386) Assembly language. Programming in Assembly on Mac OS X can be tricky because not quite well documented. Uli Kusterer‘s article got me started originally, even though his article explains Assembly programming by using the GNU C Compiler (GCC) and therefore the AT&T; assembler syntax. I wanted to try something different, a cross-platform solution similar to GAS but with a different syntax, I opted for The Netwide Assembler, or better known as NASM. NASM comes pre-installed with the programming tools found on the Mac OS X installation disk, together with Xcode and WebObjects. NASM and the syntax are well documented and even Apple offers a documentation page for NASM [external link]. If you have got Xcode installed, just open your terminal and type:
OS Mac OS X 10.10.4 Processor Intel 2.0 GHz RAM 4GB Hard Disk 35GB Graphics 1GB Input Keyboard. 🧹 Clean first your mac before you patch Movavi Screen Recorder. 🍏 For everyone who can't patch Movavi Screen Recorder on Mac and to overcome applications errors you should first Clean your Mac Before you Install it. Many security, privacy, and performance features; Integrated VPN.
As the statement clearly shows, this command makes sure you have got NASM installed on your machine and even what version you have got running. The main problem I found when programming in NASM Assembly is the difference in the system calls between NASM under Linux or Windows and NASM under certain flavors of Unix / Mac OS X. The main difference is that Mac OS X is based on the Mach kernel which is derived from the BSD implementation of Unix in NEXTSTEP. So basically if we try to assemble the code using the Windows / Linux system calls, the assembler will not complain, the linker neither, although when we try to run the executable, the OS might output an error message, it displays a:
or it will silently run the application which will not display our desired output, but instead it returns the control to the kernel, displaying just a blank line at the terminal. The right system calls I found are used for the FreeBSD Unix distribution available freely online. FreeBSD is yet another flavor of Unix, again based on top of the BSD kernel, or exactly a descended from AT&T; UNIX via the Berkeley Software Distribution (BSD) branch through the 386BSD and 4.4BSD operating systems. A simple and classic ‘Hello, World’ example using FreeBSD NASM Assembly is shown below:
to assemble this code and output an object file we need to call NASM with this command:
which basically says, assemble my hello.asm file into an intermediate object file (eventually named hello.o) by using the Mach output format. If everything assembled successfully, we can see a file named hello.o. We now need to call the Linker to make an executable out of our object file, the only flags I found to be working under Mac OS X are the following ones:
Clear isn’t it?
In this case, we are calling the ld command and passing in a few arguments.
The ‘-e’ flag will tell linker the exact entry point, the entry point is the address of the first section in the first segment, in our case, the entry point is the _start section in the hello.asm file.
The ‘-o’ flag will tell the linker the name we would like to give the executable, once linked from the original hello.o object file.
If everything assembled and linked successfully, we should now have the executable ready to run. The file should be named ‘Hello’ with no extensions. Try running this application:
and you should get:
at the Terminal.
Finished!
I hope this will give you a head start into learning the basics of Assembly Language. Please let me know if you would like some more NASM tutorials in the future, and please don’t hesitate to contact me or leave some comments. Thanks for reading.
Hello Alien Mac Os Update
Has your Mac computer been running into issues lately? It might be time to give it a fresh OS (operating system) installation. This process is actually straightforward and simple. Here’s how to reinstall your Mac operating system(OS).
Warning: Make sure you do a full backup of your files before you reinstall your operating system.
How to Reinstall Mac OS Using Recovery Mode
Using the Recovery Mode is an easy way to reinstall your Mac OS. Follow the steps below to get a new version of your operating system:
Note: Your Mac needs to be connected to the internet to install or reinstall macOS.
- Restart your Mac. You can do this by holding down the power button or by clicking the Apple logo by the top left corner of the screen and selecting Restart.
- As your computer is restarting, hold down the Command + R keys. Keep holding them down until you see the Apple logo appear on your screen. When the Apple logo appears, release the command and R keys.
- When you are in recovery mode, click Reinstall macOS and then click continue.
- When the installer window pops up, click Continue. You will be shown the terms and conditions for installing the OS. Click Agree and then select your hard drive in the next window. Click Install to initiate the process.
How to Install macOS By Wiping Hard Drive First
If you wish to do a clean installation of yourMac operating system, you will need to wipe the internal hard drive first. You shoulddo this if you are selling your device or giving it to someone else touse.
- Restart your Mac.
- While your computer is restarting, press and holding the Command + R keys.
- Click Disc Utility and then click continue.
- Click View > Show All Devices.
- Select your Mac’s drive and then click Erase. This will be the highest option in the device tree.
- Click Erase and fill in the name, format, and Scheme.
- Name: You can choose any name you want, but it’s recommended to name the disk something generic.
- Format: You can choose either APFS (Apple File System) or macOS Extended (Journaled). The Disk Utility will show the compatible format by default. Most older computers will be Journaled, while most modern laptops that come with solid-state drives (SSD) are APFS-formatted.
- Scheme: Choose GUID Partition Map
- Select Erase by the bottom right corner of the screen. This step will start the process of wiping your Mac’s hard drive. This process will take a few hours, so make sure that your Mac is plugged in. When prompted, click Done.
- Once your data is wiped, you can then start the reinstallation process. If you are in the functioning recovery partition when you booted, you will see the Reinstall macOS option. Click the button, and the process will start.
This step will take a little while. When theprocess is complete, your Mac will restart. You can then create a new account.Skip creating a new account if you are selling or giving away your device.Leave that step to the new owner.
Installing a fresh copy or reinstalling the operating of your Mac is an easy process, as long as you are connected to the internet and your computer is plugged into a power source.
If you are having a problem with a specific application, you can learn how to uninstall programs from your Mac here.