Why does my macbook pro only start up in safe mode?

Last night i updated my macbook pro, and when it restarted it stopped at the logo with the spinning wheel, and it kept spinning for 20+ minutes. I shut it down by holding the button, and it will not start up again, every time the wheel just keeps spinning. I tried holding down shift, and starting it in safe mode, and that seemed to work. But that is the only way it will boot up, and I am limited to what I can do. How can I start my macbook pro up with out safe mode. I do not have my installation disk with me, and I do not have any of my stuff backed up, but I plan on purchasing a external hard drive within the next week to back up everything, incase I have to wipe my hard drive. But I will only do that at last resort...

MacBook Pro 3,1 15' 2,2 Core 2 Duo Late 2007.
I used the same buss speed (667 mhz) and the same type DDR2. Same number of pins.
I also checked what happened with 0 ram in slots, and then it started blinking constantly.
So it must see the RAM but the RAM seems useless for some reason...

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Today I changed ram on my old macbook pro. 667hz DDR2 type from 2X1 TO 2X2.
After i finished the installation my laptop has not worked properly. It currently runs 10.7.
No startup sound, and the white light at the bottom flashes constantly in sequenses of three. Three quick flashes.
What is wrong? Even when I re-inserted my old RAM the same problem occurred.
Please help!

MacBook Pro 3,1 15' 2,2 Core 2 Duo Late 2007.
I used the same buss speed (667 mhz) and the same type DDR2. Same number of pins.
I also checked what happened with 0 ram in slots, and then it started blinking constantly.
So it must see the RAM but the RAM seems useless for some reason...

After Yosemite install MacBook Pro only starts up in Recovery Mode

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I installed Yosemite on my mid-2009 MacBook Pro 13" yesterday and when restarting it after the installation, it starts up in Recovery Mode. When I verify the disk in Disk Utility, it says there is no problem. I would reinstall OS X but it says I don't have enough free disk space do to that (I have around 9.5 GB). But in Recovery Mode I cannot delete files to free up disk space (at least I don't know how to do it). My latest Time Machine backup is quite old (my fault, I know...), so now I am stuck...
Could anyone help me, I am becoming quite worried and stressed now.:(
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kicilani

Some would consider what you have to be an adware issue, in that the product is of no
help to the Mac OSX, the computer, or your use of it as intended.
See this ASC discussion:
Re: Need help to remove adware downloader_setup_mac.dmg!
•Adware Removal Guide - manual removal methods:
http://www.thesafemac.com/arg/
•Adware Medic - from the author of thesafemac:
http://www.adwaremedic.com/index.php
Good luck & happy computing!

My MacBook Pro keeps starting up in safe mode and then just before halfway through it turns off

I shutdown my mac as it was working slowly. The startup disk was almost full so I decided to restart it. Once I restarted it it was stuck trying to start up so I restarted it in safe mode. Now the safe mode bar loads about 40% then disappears completely after which the mac turns off. I have tried PRAM reset. What is likely to be the problem?

Maximillianmann,
depending upon how full “almost full” actually is, that could be the problem.
You can try this, if you have Mac OS X 10.7 or newer installed, to see if it’s not related to your disk being almost full: boot your MacBook Pro into Recovery mode by holding down a Command key and the R key as it starts up. Once the Mac OS X Utilities menu appears, select Disk Utility. On the left-hand side of the Disk Utility window, select your internal disk’s boot partition (typically called “Macintosh HD”). On the right-hand side, press the Verify Disk button if it’s not greyed out; if it is greyed out, or if it reports that errors were found, press the Repair Disk button. Once the verification/repair is completed, exit Disk Utility and select Restart from the Apple menu to restart in normal mode. Once you hear the startup chime, try booting into Safe mode; does it let you do so now?

Why does my macbook pro stop loading the webpage every time i try to access netflix or youtube?

Why does my macbook pro stop loading the webpage (in safari) every time I try to access netflix or youtube?

Back up all data before proceeding.
This procedure will unlock all your user files (not system files) and reset their ownership, permissions, and access controls to the default. If you've intentionally set special values for those attributes on any of your files, they will be reverted. In that case, either stop here, or be prepared to recreate the settings if necessary. Do so only after verifying that those settings didn't cause the problem. If none of this is meaningful to you, you don't need to worry about it, but you do need to follow the instructions below.
Step 1
If you have more than one user, and the one in question is not an administrator, then go to Step 2.
Triple-click anywhere in the following line on this page to select it:
sudo find ~ $TMPDIR.. -exec chflags -h nouchg,nouappnd,noschg,nosappnd {} + -exec chown -h $UID {} + -exec chmod +rw {} + -exec chmod -h -N {} + -type d -exec chmod -h +x {} + 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window by pressing command-V. I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key after pasting.
You'll be prompted for your login password, which won't be displayed when you type it. Type carefully and then press return. You may get a one-time warning to be careful. If you don’t have a login password, you’ll need to set one before you can run the command. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.
The command may take several minutes to run, depending on how many files you have. Wait for a new line ending in a dollar sign ($) to appear, then quit Terminal.
Step 2 (optional)
Take this step only if you have trouble with Step 1, if you prefer not to take it, or if it doesn't solve the problem.
Start up in Recovery mode. When the OS X Utilities screen appears, select
Utilities ▹ Terminal
from the menu bar. A Terminal window will open. In that window, type this:
res
Press the tab key. The partial command you typed will automatically be completed to this:
resetpassword
Press return. A Reset Password window will open. You’re not going to reset a password.
Select your startup volume ("Macintosh HD," unless you gave it a different name) if not already selected.
Select your username from the menu labeled Select the user account if not already selected.
Under Reset Home Directory Permissions and ACLs, click the Reset button.
Select
 ▹ Restart
from the menu bar.

Why does my MacBook Pro and Mac Pro keep freezing?

Why does my MacBook Pro freeze?
MacBook Pro
2.4 GHz intel Core2 Duo
4BB 1067 MHz DDR3
OSX 10.6.8 Snow Leopard
I turned it on and I went to safari to look things up. Safari froze and then the whole thing became unresponsive - the mouse could move the cursor but it couldn't open any programmes.
Tried safe boot several times. No help.
Tried to repair disc permissions. The first time it got a little way then said 'user stopped repair' or something - though I didn't touch it. Tried again it got all the way through and said 'repairs complete'. But no help.
Couldn't clear cache etc as couldn't get to the relevant part to do it.
Opened in single user mode. Ran the fsck -fy thing twice. First time it said both “The volume appears to be OK” AND “FILE SYSTEM WAS MODIFIED.” In 2nd run it just said “The volume appears to be OK”. No help.
Booted it up from the Superduper bootable backup version on a USB external drive. It seemed to boot up ok but then tried to click on something and the same thing happened - spinning beach ball and it just hung.
Erased hard drive and reinstalled snow leopard but it just does the same thing. Suggesting a hardware issue not software but...the Eerie thing is, we tried backup version on boyfriends Mac Pro and it worked fine on there but 24hrs later his Mac Pro has got exactly the same screen freezing, unresponsive issue. Could this suggest there's something evil lurking on my back up? Can't get an appointment at Genius Bar until next week and need to get some work done, so hoping someone might have some ideas?
Cheers
Kerry

KaiDonald wrote:
... does Apple products work much better with using Apple routers?
While a genuine Apple router is likely to result in success, the reason for having one instead of another product is that it eliminates a lot of uncertainty. For example, we do not know the model D-Link product you have so no one is in position to speculate what the problem might be. Also, it makes support on this forum easier since there are only three AirPort models to choose from and they all work more or less the same.
Generally speaking your iPods, iPads, MacBooks, and AppleTV ought to work with any router though, provided it is fairly recent and meets accepted industry standards. If in doubt you can purchase an AirPort Base Station, which comes with 90 days of free telephone support. If it does not result in any improvement for you, you can always return it for a complete refund. The return period is 14 days and be sure to keep all material - receipt, box, manuals, etc...
If you elect this option be sure to follow its installation instructions, the most important of which is to power down your modem prior to connecting the AirPort Extreme, Express, or Time Capsule. All your other equipment will need their network settings adjusted to "forget" the D-Link network and connect to the new one.

Why does my macbook pro get hot

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Open Activity Monitor in the Utilities folder. Select All Processes from the Processes dropdown menu. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time (>=70,) then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.

Why does my Macbook Pro keep shutting down during installation of OSX Mountain Lion?

Why does my Macbook Pro keep shutting down during installation of OSX Mountain Lion?

Hmm, good luck then!
I'm pretty much exactly on the opposite side of the planet, but I've been to Vermont and remember its rural beauty well. However, I can't imagine you having the only Internet connection within a reasonable radius (where "neighbors" hanging off the same ISP don't count). Uh, that note only if your wired connection to the router produces no good result, either...

What is application memory and why does my macbook pro keep running out of it?

what is application memory and why does my macbook pro keep running out of it?

There is excessive swapping of data between physical memory (that is, the memory chips on the logic board) and virtual memory (one or more files on the startup volume.) That activity is relatively slow and causes the whole system to be less responsive. It can happen for two reasons:
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Please note that if the cause is a memory leak, installing more memory will not help. That's likely if you already have more than 4 GB of memory. Tracking down a memory leak can be difficult, and it may come down to a process of elimination.
These instructions are for OS X 10.9 and later. Some details may be slightly different for earlier versions of OS X.
When you notice the swap activity, open the Activity Monitor application and select All Processes from the View menu, if it's not already selected. Select the Memory tab. Click the heading of the Real Mem column in the process table twice to sort the table with the highest value at the top. If you don't see that column, select
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If one process (excluding "kernel_task") is using much more memory than all the others, that could be an indication of a leak. A better indication would be a process that continually grabs more and more real memory over time without ever releasing it. Here is an example of how it's done.
The processes named "Safari Web Content" render web pages for Safari. They use a lot of memory and may leak if certain Safari extensions or third-party web plugins are installed. Consider them prime suspects.
Another process often implicated in memory leaks is "inkjet4" or "inkjet8," which is a component of the HP printing software. If it's present, force-quit the process in Activity Monitor to solve the problem temporarily. Empty the print queues in the Printers & Scanners preference pane (which has a slightly different name in each recent version of OS X.) If you don't use an HP printer, reset the printing system. Otherwise, if the problem is recurrent, update the software (which may not help) or contact HP support.
"Wired" memory should be a small part of the total. That memory is not swapped, but it makes less physical memory available which may then result in swapping. If you have a lot of wired memory, that's usually an indication of a memory leak in a third-party program that modifies the operating system at a low level. Ask for guidance in that case.
If you don't have an obvious memory leak, your options are to install more memory (if possible) or to run fewer programs simultaneously.
The next suggestion is only for users familiar with the shell. For a more precise, but potentially misleading, test, run the following command:
sudo leaks -nocontext -nostacks process | grep total
where process is the name of a process you suspect of leaking memory. Almost every process will leak some memory; the question is how much, and especially how much the leak increases with time. I can’t be more specific. See the leaks(1) man page and the Apple developer documentation for details.

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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
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This may answer your Bonjour questions:
http://support.apple.com/kb/PH11449
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Ciao.

Why does my macbook pro only start up in safe mode?

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