Posts Tagged ‘pram’
August 17th, 2009 | 
Author: Operating system (also known as system software) is the most important component of a computer system, which is responsible for coordination and management of activities and sharing of computer resources. It works as an interface between software and hardware.
But sometimes when you start your Mac OS X computer, you might see a flashing question mark. It prevents you to start your system and makes all of your valuable data inaccessible. This behavior of Mac OS X results into critical data loss situations and require Mac Data Recovery to be sorted out.
This behavior generally occurs when your system can not file and system software, which is required to start up. In case of flashing question mark, one of the below things may occur:
System starts up after a brief delay
System does not start up
Resolution
If your system starts up properly, you just need to select the start up disk again in the Startup Disk preferences. This is usual to see flashing question mark when the startup disk hasn’t been selected.
If you re using MacBook Air, you have two options to start your system with the software installation DVD:
Connect MacBook Air SuperDrive with MacBook Air using USB port and then restart the system, holding the C key during startup.
Go for Remote Install Mac OS X to start it from system software DVD, which is located on partner computer.
If your system does not boot up from the system software DVD and hard drive is not mounted or available, then reset the PRAM (Parameter Read Only Memory) and try again.
When all of the above methods can not perform Mac File Recovery, then you need to carry out Erase and Install installation of Mac OS X. It is helpful in resolving most of the operating system related issues, but it also has a downside. It deletes all of the data from your hard drive and cause complete data loss.
In such situations, you need to perform Mac Recovery using third party applications. These software thoroughly scan the whole hard drive and extract all of the lost data from it. With self-descriptive and interactive user interface, these software allow you to have quick and easy File Recovery Mac.
Stellar Phoenix Mac Recovery is the best ever made and the most powerful tool to recover lost data from HFS, HFS+, HFSX, HFS Wrapper and FAT file system. This software is designed for Mac OS X 10.5 Leopard, 10.4 Tiger and 10.3.9 Panther.
Jonny a student of Mass Communication doing research on mac file recovery and mac recovery software. He is also a freelancer for http://www.stellarinfo.com
Article Source: Flashing Question Mark and Data Loss in Mac
A Kernel is the basic and central component of any operating system, which is responsible for providing basic services to all parts of operating system. Its features include providing lowest-level abstraction layer for the resources and managing the system resources. A kernel panic is a state when it receives any instruction, which can’t be handled or is received in an unexpected format, which eventually creates Mac Recovery needs. When an error has occurred, but the operating system is not being able to recover from it, kernel panic is said to occur. Kernel panic can result from both software and hardware issues.
In Mac OS X, Kernel panic is encountered in different forms of error messages and unexpected system behavior. One of the Kernel panic error message has been illustrated, which typically occurs in Mac OS X 10.5 (Leopard):
“You need to restart your computer”
Cause
The stated error message indicates the issues with operating system. This particularly occurs when any of the important system files or folder has got damaged, renamed or moved and thus is creating problems for Leopard to start correctly.
Solution
Reinstalling Mac operating system can cure all the related issues. But, if it is known that none of the system files or folder has been changed, then we can restart the system, while holding X key. Then we need to select Apple menu> System Preferences and click Startup Disk, making sure that the disk containing Leopard is selected. Alternatively, we can also start the system, holding Option key and select Leopard disk, click the forward arrow and continue starting. After restarting the system, we need to reset PRAM and then use System Preferences to restore the settings.
On the other hand, if system file is being the issue, then we can reinstall the operating system after backing up all the important data, which can prevent Mac Data Recovery needs.
If data backup has not been taken or backup fails while attempting restoration, Data Recovery Mac software can help extracting. Mac Recovery utilities can scan and recover the lost information and restore them at safe location. We need to check the compatibility of Data Recovery Mac application and should install it on other system.
Stellar Phoenix Macintosh Data Recovery software is known for using powerful Mac Data Recovery algorithms, which extract the lost data effectively. This Mac Recovery software is compatible with Mac 10.3.9 and above versions and can be used with disk having HFS, HFS+, HFS X and HFS Wrapper file systems. Interactive interface and easy to use Data Recovery Mac options make the application perfect at its work.
Allen Sood a student of Mass Communication doing research on data recovery and mac data recovery software. He is also a freelancer for http://www.stellarinfo.com
Article Source: Kernel Panic in Leopard
Sometimes you have to restart your Mac system to clear up several system processes to free up system resources. It is the best solution to save your system from freezing. But sometimes after restart, Mac may give you a gray spinner. After this, the system gets stuck and the data becomes inaccessible.
In such grave situations, technical experts suggest to use Disk Utility, Zap PRAM and some other standard resolutions. But these resolutions work in limited cases and can not fix start-up sticking problems.
In these cases, it would be worth to perform complete system restore from your Time Machine backup. Mac Time Machine allows you to create backup on internal hard drive, external hard drive or remote storage media.
In such kind of cases, when you restore from Time Machine Backup, it gets completed successfully. All of your files and folders seem fine.
After successful restoration, when you restart your Mac using the restored boot drive, the system creates some problem while logging in.
In such situations, you can not move any file or folder through drag and drop. When you open any file or folder, the terminal goes into the spinning beach ball. The spotlight does not work.
Everything from your Mac hard drive becomes inaccessible and you can not use your precious data. It is the worst scenario, which a Mac user could face. It may possibly put you out of the business.
Cause
This problem generally occurs due to damaged groups or incorrect permission. It could be the result of unexpected system shutdown, virus attack and the similar reasons. Nevertheless the cause of this issues, it is essential to fix it as soon as possible.
Resolution
Damaged groups and permissions can be fixed only by reinstalling all the system files and data structures. It is potential by formatting the hard drive and reinstalling the operating system.
Though, it is the ultimate cure of all the problems, but also has a downside. It will wipe out all the data from hard drive, eventually making the situations worst. But you should not panic, as Mac recovery solutions are available.
Mac recovery can be done through Mac data recovery software. Mac data recovery software are very easy to use applications, which systematically scan entire hard drive and end up at absolute data recovery Mac. There are several Mac data recovery software available in the market, but selecting the best one among them is really essential.
Stellar Phoenix Macintosh Data Recovery software is the ultimate solution of all your Mac data loss related worries. This robust data recovery Mac tools has amazing power for retrieving all your lost data. It supports Mac recovery from all file versions of Mac OS X, having HFS, HFS+, HFSX and HFS Wrapper file systems.
Simpson is a freelancer for Stellar which offers data recovery software and file recovery programs for different OS and file system including data recovery mac, data recovery linux, mac recovery, pst recovery and many other programs.
Article Source: Damaged Groups and Permissions Could Lead to Mac Data Loss
The EFI or Extensible Firmware Interface is the specification, defining the software interface between Mac operating system and platform firmware. EFI boot process involves a boot manager which is built into the firmware. But with few of the Mac systems, the boot drive options are found to be changed to include EFI boot.
When the user desires to choose from the available boot volumes, the boot menu starts displaying the options which have never been expected. The EFI boot option
starts displaying and you have no clue of the bootable volume which has lots of important data within. Also the booting process may not be as usual, but the drive name appears as normal in Finder.
The condition is threatening as the data stored can’t be lost in this way. The possible culprit behind the scene could be the some modifications, done to volume structure of the drive. This is also feasible that the user has restored a clone of the hard drive after upgrading or any other case.
In such conditions, the user is recommended to stop doing anything with the system and follow the given steps:
· If you are cloning the hard drive, try using some alternative method. It should be a bit-for-bit transfer as small differences could create problems. You can try cloning a temporary external disk and then replacing the internal one and then cloning back.
· Try using the disk repair utility
· Reset PRAM as this might contain some boot information
· Attempt changing the startup disk in System Preference as this could be the result of some firmware settings
· Erase all the partitions of the drive as the last resort by using the Disk Utility
Erasing or formatting the hard drive partitions mean that all your data has gone and this is the time to have Mac recovery. Data worth when this is significant from business point of view. So Mac data recovery needs productive source to happen.
Data recovery industry has benefited the users with data recovery Mac software which have the high scanning ability for the lost data. These Mac recovery utilities are easy to use and well in results.
Stellar Phoenix Macintosh Data Recovery software is the advanced Mac data recovery help, offered to scan the affected drive. This data recovery Mac application is found to be compatible with HFS, HFS+, HFSX and HFS Wrapper file systems. Through its read-only conduct, the software is viable to get safe Mac recovery.
Williamz Jack work as a freelancer and researcher of Data Recovery & File Recovery Software.
Article Source: Boot Options Change To ‘EFI Boot’ in Mac