Category: MAC OS X

Mac hardware and softwaer tweeks in order to get what we want out of MAC.


Disabling Apple SIP Protection

Introduction: SIP protection defined by Apple as “technology in OS X El Capitan and later that’s designed to help prevent potentially malicious software from modifying protected files and folders.” It locks down the system extensions folder which makes it so driver applications like ours cannot write to that folder unless you disable SIP protection. For …

Linux, MAC OS X, Security

SSH doesn’t accept my key since upgrade Mac OS X to Sierra

Introduction: I have two MacBooks. One that still has Mavericks OS X and one that I just upgrade to Sierra OS X. Since the upgrade I can’t connect via SSH to one of my Linux servers using the RSA/DSA Keys any more. It always asks for a password. After adding the ‘-v’ option to the …

Linux, MAC OS X

Making a PC bootable USB stick using an .iso file on MAC

Introduction: Although Mac has been changed a lot since the days of Free-BSD it is still Unix and has lots of commands that are very compatible with the ones of its brother Linux. So here are the commands done in the Mac terminal which creates a bootable USB drive using an ISO file as the …

Linux, MAC OS X

Extending SSD life expectancy by tuning Firefox

Introduction: If you are using Firefox and SSD drive(s) then according to this site: it is very recommended to make the small configuration change in Firefox to extend the life of your SSD. Reason: SSD Drives do have a lifespan depending on how many times we write to it. Therefore the function of regular …


Activating TRIM support for non-Apple SSDs

Introduction: For a long time since the SSDs have appeared on the market, Apple had as default disabled the TRIP support for the SSDs IF the SSD was not manufactured from Apple. Thad certainly didn’t quite pleased the Mac users who wanted to upgrade their Macs with a non-Apple SSD. The company Cindori has since …


Disable the ‘System Integrity Protection’ in Mac

Follow these steps: 1. Boot to Recovery OS by restarting your machine and holding down the Command and R keys at startup. 2. Launch Terminal from the Utilities menu. 3. Enter the following command: csrutil enable –without debug Reboot your computer.

Apache, Linux, MAC OS X, Postfix, Security, Windows, Wordpress

Testing SSL Connections with SSLyze, Nmap or OpenSSL

Introduction: OpenSSL is a great tool to check SSL connections to servers. The difficulty here is when one want a full scan of all possible SSL Cyphers and protocols used by a server. That is where SSLyze comes in handy. This tool is a Python script which will scan the target host/port for SSL handshake …


Trouble installing Yosemite/El Capitan MAC OS X

Introduction: You downloaded Yosemite or El Capitan Mac OS X and decided to install it a month or so later. As you start to install it and you get the error message: “This copy of the Install OS X Yosemite(El Capitan) application can’t be verified. It may have been corrupted or tampered with during downloading.” …


How to upgrade your Mac from a rotary(regular) hard disk to an SSD.

Introduction: Very often friends that have a Mac or PC tell me that they need to buy a new Mac/PC because the present one has become too slow. Generally these machines have no internal SSD installed as system hard disk. In this case I often recommend to install an SSD instead of buying a new …

Linux, Linux on MACBook, MAC OS X

How to create a USB stick bootable on OS X

This article is based on the following How-to in Ubuntu site: We would encourage Mac users to download Ubuntu Desktop Edition by burning a CD. But if you prefer to use a USB stick, please follow the instructions below. Note: this procedure requires that you create an .img file from the .iso file you …

Linux, MAC OS X

Resuming files copy after break with rsync

In my work, I often need to transfer large files from my MAC desktop to a Linux server in Internet. Since the Internet connection is often broken and changes IP, transferring of large files really can be difficult. That is where rsync come to the rescue by saving the already transferred part of the file …


Creating a Mavericks MAC OS X Install USB Stick

In order to install a OS X Mavericks completely fresh on a new hard disk from scratch, here are the recommended steps: 1 – Get the from Apple in Internet. 2 – Create an OSX Mavericks Install USB stick from this APP 3 – Reformat the destination hard disk in Mac OS Extended (Journalled) …

Linux, MAC OS X

HowTo Flush Linux dns cache

This article is bee extracted from the URL: of which many thanks for posting the article. I extracted what I needed and posted it again here mostly for me as a reminder. HowTo: Flush nscd dns cache Nscd caches libc-issued requests to the Name Service. If retrieving NSS data is fairly expensive, nscd is …


Resetting the default screen resolution in MAC OS X 10.6.x (Snow Leopard)

Just as I thought that Mac was having it perfect in the area of screen resolution and detection, suddenly my MacBook Pro started to display a slightly zoommed-up screeen where I needed to bring the mouse to the edges of the screen to move it a bit and see the rest of the display. Tried …

Linux, MAC OS X, Windows

Speeding up Firefox Browser

Google Chrome has now eclipsed Mozilla Firefox in the speed category. However, I still use Firefox as my main web browser because it is still better than Chrome in certain areas. But just recently, I tried a few tweaks that significantly improved the speed of Firefox making it a little bit snappier than the latest …


Solution to aslmanager process high CPU usage

Since the new migration of log files management from syslogd to aslmanager it is possible to encounter some problems regarding the high CPU usage by aslmanager process. One of the solution is to restart the aslmanager indexing by moving the logs in a temporary directory and restarting the syslogd/aslmanager service. Here are the commands: Stopping …