No start up screen

Hello, The power on indicator light on the front of computer blinks 5 times amber, pause, blinks 5 times amber repeatedly, it will not boot. The light originally was a solid blue when turned on.

Deadly 223, welcome to the forum.
Here is a guide that explains the BIOS Beep and LED codes for a HP computer. I believe that it is appropriate for your computer. According to the guide the 5 blinks and 5 beeps indicate that there is a memory problem. You didn't mention any beeps, however. Read the guide to see if it appears to be applicable to your situation.
Please click the "Thumbs up + button" if I have helped you and click "Accept as Solution" if your problem is solved.
Signature:
HP TouchPad - 1.2 GHz; 1 GB memory; 32 GB storage; WebOS/CyanogenMod 11(Kit Kat)
HP 10 Plus; Android-Kit Kat; 1.0 GHz Allwinner A31 ARM Cortex A7 Quad Core Processor ; 2GB RAM Memory Long: 2 GB DDR3L SDRAM (1600MHz); 16GB disable eMMC 16GB v4.51
HP Omen; i7-4710QH; 8 GB memory; 256 GB San Disk SSD; Win 8.1
HP Photosmart 7520 AIO
++++++++++++++++++
**Click the Thumbs Up+ to say 'Thanks' and the 'Accept as Solution' if I have solved your problem.**
Intelligence is God given; Wisdom is the sum of our mistakes!
I am not an HP employee.

Similar Messages

HP Envy 14 - black screen after start up screen when trying to recover the system

I have a HP Envy 14 and months ago I got the message "Hard Drive failure imminent".
Well, the HD finally stopped working and I got a Kingston ssd hyperx 240gb to replace it.
I have the HP recovery disks, so I tried to recover my system with them. The 6 disks are used to creat an image and then I have to click "continue" in order to re-initiate the sytem. Then, I get the usual HP start up screen, so I hit enter. Then, I get a black screen (screen is on) and nothing happens. I've done this 4 times and always get the same black screen at the end.
Any suggestions to solve this problem?
Many thanks.

Hi
At this point you may consider contacting Kingston to ask them why your SSD is not running after POST when clearly Windows is installed .
Checkurtech
****Click the White Kudos star to say thanks****
****Please mark Accept As Solution if it solves your problem****

I am experiencing some major problems with my MacBook Pro. I have had some issues with it turning on/off at random times, but today, when starting, I get the grey start-up screen and a recovery bar. After filling in approx 1/4 of the way, the machine dies

I am experiencing some major problems with my MacBook Pro. I have had some issues with it turning on/off at random times, but today, when starting, I get the grey start-up screen and a recovery bar. After filling in approx 1/4 of the way, the machine dies. After starting it in recovery mode, it will not allow me to download OS X Mavericks- it says the disk is locked. Any ideas? I do not have a back-up and do not want to erase everything before I have explored my options. Help?

try forcing internet recover, hold 3 keys - command, option, r - you should see a spinning globe
most people will tell you to do both pram and smc resets (google) and if you still have issues, either clean install (easy) or troubleshoot (hard)

HT4061 ipod 4th generation stuck on start up screen, won't do anything (the black screen with the silverish apple). Help?

This morning, i tried turning on my ipod (4th generation) and it is stuck at the black start upp screen (the screen that has the siverish apple when you have first turned on your device). It has been stuck like this for about a half an hour now, and I'm not sure what to do. This would be the second time in at least three months I have had problems with it (around December it went into recovery mode and i had to reset it to the factory settings). Is there anyway I can handle this at home, or do i have to go into an apple store to have this fixed? Also, I plugged it into my computer and it didnt show up in itunes like it did last time. Thanks! (I'm pretty sure its the IOS 6 because i have not updated it since then).

Try:
- iOS: Not responding or does not turn on
- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try on another computer
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
Apple Retail Store - Genius Bar

My iPad shows a text box on my start up screen iCloud backup stating that the iPad has not been backed up in 2 weeks etc and i press "ok" to acknowledge but it will not erase and I cannot turn the pad off by the main on off switch - cannot use pad!!

My ipad shows a text box on my start up screen stating icloud backup - this ipad hasnt been backed up in 2 weeks . backups happen when this ipad is plugged in, locked and connected to wi fi and ok under - so press ok but cannot remove the box or back to my home screen and cannot turn off the ipad from main switch at top of pad? Can anybody help? Thanks

Perform a Reset...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430

I need to reinstall my operating system for 10.5 after seeing a file folder and question mark flashing on my start up screen. Can anyone help me with this?

I need to reinstall my operating system for 10.5 after seeing a file folder and question mark flashing on my start up screen. Can anyone help me with this?

Hello,
That means it can find the Hard Drive, or can't find the things needed for booting.
See if DU even sees it.
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)

Why do I need to start up Screen Sharing twice to get it to work ?

I have an Intel Mac Mini connected to my TV, so I started using Screen Sharing from my MacBook Pro to be able to work on it when others were watching TV.
Both Macs used to have OSX 10.5 Leopard, and everything worked fine.
Now they both have OSX 10.6 Snow Leopard, and whenever I startup Screen Sharing, the connection-windows asking for my Name & Password comes up properly, but then it hangs... it stays in "Connecting..." for ever (litteraly).
I'm not able to quit or force-quit the connection-window by then, so it stays in view...
(Screen Sharing isn't even listed in the force-quit list as a running app)
but...
when I just try Screen Sharing again, I get connection immediately and it seems to work flawlessly...
...it's just that the connection-window is impossible to quit...
it stays in view an is really annoying...
this looks really crappy...
can anyone tell me why I do need to startup Screen Sharing twice to get it to work ?
Is this a bug ?
(If so : please apple fix this a.s.a.p.)
...or am I doing something wrong ?
(if so : what am I doing wrong ? and how can I get rid of this annoying screen ?)
Thank you for your kind reply.
Toon.B

it's October and this really annoying problem still exists !
the unnamed screensharing-loginwindow keeps "Connecting...", and I'm unable to shut it down...
...even after my screen sharing session is over
...even force-quitting is impossible (this 'app' just isn't showing up in the force-quit-window...)
please Apple - fix this ; under 10.5 it was working great !
Does anyone have any idea how to fix this ?
(besides restarting my Mac)
Thanks !
Toon.B

My macbook wont start the screen turn blue and stay like that for hrs. It only work when i use safe mode, i try to use disk utilities to fix it but the disk utilities keep saying error and a bunch of other stuff. I dont the cds the comp came with, help.

my macbook wont start the screen turn blue and stay like that for hrs. It only work when i use safe mode, i try to use disk utilities to fix it but the disk utilities keep saying error and a bunch of other stuff. I dont the cds the comp came with, help. i've tried the command s command p command v but nothing i've tried to the safe mode then a quick restart but nothing
disk utility give me this:
Process:         Disk Utility [371]
Path:            /Applications/Utilities/Disk Utility.app/Contents/MacOS/Disk Utility
Identifier:      com.apple.DiskUtility
Version:         11.5.2 (298.4)
Build Info:      DiskUtility-2980400~60
Code Type:       X86-64 (Native)
Parent Process: launchd [86]
Date/Time:       2013-11-05 03:29:41.247 -0500
OS Version:      Mac OS X 10.6.8 (10K549)
Report Version: 6
Interval Since Last Report:          9522 sec
Crashes Since Last Report:           29
Per-App Interval Since Last Report: 981 sec
Per-App Crashes Since Last Report:   25
Anonymous UUID:                      F6B8E263-76C8-4C7D-AA58-48134BF4BA78
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000020
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0   libobjc.A.dylib                         0x0000000100c62fbc _read_images + 312
1   libobjc.A.dylib                         0x0000000100c79721 map_images_nolock + 1266
2   libobjc.A.dylib                         0x0000000100c62761 map_images + 115
3   dyld                                    0x00007fff5fc039c5 dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) + 853
4   dyld                                    0x00007fff5fc0c849 ImageLoader::link(ImageLoader::LinkContext const&, bool, bool, ImageLoader::RPathChain const&) + 201
5   dyld                                    0x00007fff5fc04d54 dyld::link(ImageLoader*, bool, ImageLoader::RPathChain const&) + 118
6   dyld                                    0x00007fff5fc08f7c dlopen + 490
7   libSystem.B.dylib                       0x0000000100a14e40 dlopen + 61
8   com.apple.CoreFoundation                0x0000000100d78ef7 _CFBundleDlfcnLoadBundle + 231
9   com.apple.CoreFoundation                0x0000000100d77e97 _CFBundleLoadExecutableAndReturnError + 1191
10 com.apple.Foundation                    0x0000000101008355 _NSBundleLoadCode + 638
11 com.apple.Foundation                    0x0000000101007c78 -[NSBundle loadAndReturnError:] + 742
12 com.apple.Foundation                    0x000000010101960c -[NSBundle principalClass] + 38
13 com.apple.framework.DUSupport           0x0000000100082080 -[DUModuleManager(_private) findDUModules:] + 405
14 com.apple.framework.DUSupport           0x0000000100081ed9 -[DUModuleManager orderedModuleListOfModules] + 40
15 com.apple.DiskUtility                   0x0000000100006082 0x100000000 + 24706
16 com.apple.DiskUtility                   0x0000000100005f59 0x100000000 + 24409
17 com.apple.AppKit                        0x0000000101444625 -[NSWindowController _windowDidLoad] + 538
18 com.apple.AppKit                        0x00000001013e1f77 -[NSWindowController window] + 112
19 com.apple.AppKit                        0x00000001015f61d9 -[NSWindowController showWindow:] + 47
20 com.apple.AppKit                        0x00000001015c7c5c -[NSDocument showWindows] + 98
21 com.apple.AppKit                        0x00000001015c64bb -[NSDocumentController openUntitledDocumentAndDisplay:error:] + 340
22 com.apple.AppKit                        0x00000001014f7b44 -[NSDocumentController(NSInternal) _openUntitled] + 111
23 com.apple.AppKit                        0x00000001014f79ab -[NSApplication _doOpenUntitled] + 257
24 com.apple.AppKit                        0x00000001014f733b -[NSApplication(NSAppleEventHandling) _handleAEOpen:] + 185
25 com.apple.AppKit                        0x00000001014f6fd9 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 77
26 com.apple.Foundation                    0x0000000100ffd0d6 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 360
27 com.apple.Foundation                    0x0000000100ffcf06 _NSAppleEventManagerGenericHandler + 114
28 com.apple.AE                            0x0000000104d7332b aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 162
29 com.apple.AE                            0x0000000104d73224 dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 32
30 com.apple.AE                            0x0000000104d7312b aeProcessAppleEvent + 210
31 com.apple.HIToolbox                     0x00000001028a0619 AEProcessAppleEvent + 48
32 com.apple.AppKit                        0x00000001013fc095 _DPSNextEvent + 1191
33 com.apple.AppKit                        0x00000001013fb801 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 155
34 com.apple.AppKit                        0x00000001013c168f -[NSApplication run] + 395
35 com.apple.AppKit                        0x00000001013ba3b0 NSApplicationMain + 364
36 com.apple.DiskUtility                   0x0000000100002009 0x100000000 + 8201
37 com.apple.DiskUtility                   0x0000000100001db8 0x100000000 + 7608
Thread 1: Dispatch queue: com.apple.libdispatch-manager
0   libSystem.B.dylib                       0x0000000100a27c0a kevent + 10
1   libSystem.B.dylib                       0x0000000100a29add _dispatch_mgr_invoke + 154
2   libSystem.B.dylib                       0x0000000100a297b4 _dispatch_queue_invoke + 185
3   libSystem.B.dylib                       0x0000000100a292de _dispatch_worker_thread2 + 252
4   libSystem.B.dylib                       0x0000000100a28c08 _pthread_wqthread + 353
5   libSystem.B.dylib                       0x0000000100a28aa5 start_wqthread + 13
AND MORE TOO MUCH TO COPY N PASTE HELP PLEASE!!!!!

Reset the PRAM
Reinstall the operating system from the dvd (you will not loose your data)

Computer won't start up after recent version of mountain lion. My power Mac was running extmely slow this morning, so i shut down to restart. As it is starting the screen goes black, says something about debugging with the word panic in parentheses. was

I upgraded to latest version of mountain lion yesterday, this morning my power Mac was running extremely slowly (while typing, had to wait a second or two for words to appear), I shut down to see if problem would clear up. When starting up, screen went black with programming jargon, something about debugging with the word panic in parentheses. Screen then goes back to gray, says Mac encountered a problem and has to restart once I push a key. Apple logo comes on gray screen, icon keeps circling and nothing happens. This has happened three times in a row after shutting down and trying to restart. Any thoughts?

When verifying disk, said could not repair disk, back up as many files as possible then re format disk. Computer now doing Internet recovery. Should I. Do the following in this order
1 restore from back up on time machine
2 re install osx
These are the options coming up on osx utilities window

Can anyone help me get my iMac to reboot? I get a gray "curtain" over the start up screen saying I need to restart my computer but it won't restart. I just keep getting the same message every time.

Can anyone help me get my iMac to reboot? I get a gray "curtain" over the light gray start up screen with a message that I need to restart my computer and to hold the power button until it powers off and then press the power button again to restart. It just does this over and over again and won't restart.

Yeah, as necronym stated, it is a hardware issue and more than likely a RAM problem. Disconnect everything from the computer except keyboard and mouse and try again. If it still happens try removing one and/or swapping your RAM sticks over. Keep trying until you have eliminated all possible combinations. Just put a mark on one RAM stick so you know what have tried. If it still fails to boot properly you should probably replace your RAM, but that is no guarantee of success. Have a look at this link for more info on a Kernel Panic.
The X-Lab - http://www.thexlab.com/faqs/kernelpanics.html
Does the display look like this?

I am having sporadic issues after new hard drive install and recovery using Time Machine. The same sluggish response, start up screen pixelating...If I reinstall Lion will it wipe out other applications? My HD was formatted and partitioned correctly, I ha

I am having sporadic issues after new hard drive install and recovery using Time Machine. The same sluggish response, start up screen pixelating...If I reinstall Lion will it wipe out other applications? My HD was formatted and partitioned correctly, I have a late 2009 iMac.

Use the trackpad to scroll, thats what it was designed for. The scroll bars automatically disappear when not being used and will appear if you scroll up or down using the trackpad.
This is a user-to-user forum and most people will post on here if they have problems. You very rarely get people posting to say there update went smooth. The fact is the vast majority of Mountain Lion users will not be experiencing any major problems with the OS, or maybe with apps which are not compatible, but thats hardly Apple's fault if developers don't update their apps.

How do I back up my MacBook Pro from an external hard drive if my macbook won't boot up from the white start up screen? HELP!

I went to the Genius Bar a week ago, and the guy helping me there was nice enough to help me save some money by telling me I could replace the bad hard drive my MacBook Pro had by myself. I bought everything I needed (hard drive, screws, external hard drive) and my computer won't boot past the white start up screen. It doesn't even show the Apple sign at the start up screen. How do I back up my computer so I can save all my music, school files, etc.? Could really use someone's advice on what to do! Thanks!

Ok, to be sure I understand what's going on. You were able to boot the Macbook from the existing "damaged" internal drive, and it has been backed up to the internal.
If that is correct, your internal drive is working. Just to be sure, try booting with the R key down. Then run Disk Utility to repair the internal drive. That drive may in fact be useable.
You should be aware that you cannot boot the MBP from a Time Machine back up.
Please post back so I am sure I am understanding the situation.

Cannot install Windows 7 Pro; gets stuck on "Starting Windows" screen

I have read dozens of posts on this topic but none has helped yet.
My system has Windows 8 with UEFI. I want to install Windows 7 Pro on another partition. I have turned off Secure Boot in the UEFI/BIOS. When I try to install Windows 7 Pro from a DVD it shows "windows is loading files" and then gets stuck on "Starting Windows"
for ever. This happens even when no USB peripherals are attached.
I have already wasted many days on this. I hope someone can help.
Thanks!

Hi friends of the internet
I have been reading several forums regarding the issue of installing windows 7 (64 bit) to a computer that have had windows 8 installed previously or just a GPT formatted disk.
My Case:
Windows version installed: Windows 7 Professional N with Service Pack 1 (x64) or Windows 7 Professional (x64)
Computer used: Samsung laptop
Model Code: NP53U4C-A02SE
See the specks here:
http://www.samsung.com/dk/consumer/computer-peripherals/notebook/notebook/NP535U4C-A02SE-spec
Create a USB install disk that not freezes at ”starting windows” screen:
First I followed this great guide (Thanks Daniel):
http://
hodgin.ca/2012/10/02/creating-a-uefibios-windows-7-usb-and-installing-to-gpt-partitions/
STOP AFTER STEP 13!
1. Open a command line in administrator mode
2. run DISKPART
3. type LIST DISK
4. Look for the disk number that represents your USB drive
5. type SELECT DISK # where # represents the number of your USB drive. Get this right or you will wipe a different drive out.
6. type CLEAN
7. type CREATE PARTITION PRIMARY
8. type SELECT PARTITION 1
9. type ACTIVE
10. type FORMAT fs=fat32 quick
11. type assign
12. The drive should now be formatted and marked as active and fat32. Do not format the drive as NTFS or you will only be able to boot into the installer in BIOS mode.
13. Now you will need to copy the contents of the windows 7 install dvd to the USB with a regular copy paste from windows explorer.
Here comes a very weird hack... I do not know why it works, but I think it is all about flash drive data structure. I did these steps on a win 7 prof. computer.
(Let’s assume it’s drive E:)
Make a copy of your e:\efi\microsoft folder to e.g. your desktop.
Delete the e:\efi folder
Copy the \efi folder from a windows 8 installation disk (I used Windows 8 (x64) Professional) to the e:\efi folder. Sorry I cannot provide this for you.
Here comes the weird part. Then delete e:\efi\microsoft you just copied from the win 8 installation disk.
Copy the \microsoft folder form the desktop to e:\efi\microsoft
Resume the guide from step 18.:
http://
hodgin.ca/2012/10/02/creating-a-uefibios-windows-7-usb-and-installing-to-gpt-partitions/
18. Insert the USB in the machine and turn it on and boot into the UEFI/BIOS loader and check for boot options. On the ASUS Zenbook it detected two boot options on the USB drive. One was UEFI and one was regular BIOS. I made the
UEFI option the first choice and restarted the machine.
My bios setup was:
Secure Boot = Disable
OS Mode Selection = CSM and UEFI OS
Boot Device Priority = I made the UEFI option the first choice and restarted the machine.
The installation should start normal.
E.g. See this guide:
www.sevenforums.com/tutorials/186875-uefi-unified-extensible-firmware-interface-install-windows-7-a.html
What I did was:
Select custom installation (Advanced).
Click Drive options (Advanced).
Delete all partitions (this might not be needed). When I did not delete all partitions I was asked every time after the install, during start up by the windows boot manager to select ether win 8 or win 7.
Click new (DO NOT make Changes in the size of the disk), apply, see NOTE!
Edit the Primary partition as you want it e.g. divide it to more partitions.
Select the one you will install windows on and do a normal install.
I do not make changes in the Bios after install. The Boot priority is automatic set to “Windows boot manager”. If I change the boot mode back to OS Mode Selection = UEFI OS, the computer will freeze at the “starting windows” screen again.
All this worked for me, good luck. There might be more to it, but this is a start.
By the way, the start up time for a MBT install was 37 s. And for the GPT it was 49 s.
Remember if we stand on each other’s shoulders we will reach higher
J.
NOTE: Here the installation program should create three partitions automatically!
Partition 1 - System - The EFI System partition that contains the NTLDR, HAL, Boot.txt, and other files that are needed to boot the system, such as drivers.
Partition 2 - MSR - The Microsoft Reserved (MSR) partition that reserves space on each disk drive for subsequent use by operating system software.
Partition 3 - Primary - Where Windows is to be installed to.
If this isn’t the cast you are not installing in UEIF mode. To check for this (thanks again Daniel):
If you need to find out if you have booted into BIOS mode or UEFI mode when the installer starts you can press SHIFT+F10 when the welcome installer shows up to open a cmd prompt. from here you will likely be at X:\Sources. Type cd .. to
go back a dir and move into \Windows\Panther\
Then type notepad setupact.log
Within this file do a ctrl+f and search for
Callback_BootEnvironmentDetect: Detected boot environment:
It should either say BIOS or UEFI.
To check if your disk is in the GPT format.
Open the command prompt.
Type: DISKPART
Type: List Disk
See for the star (*) in the GPT column

Photoshop CS2 Start Up Screen

How do I adjust settings so I can get a full,clear photoshop workspace when launching Photoshop CS2 on my Mac G4. My OSX start up screen is constantly in the background. How to adjust? Thanks

http://www.versiontracker.com/dyn/moreinfo/macosx/26396
http://www.manytricks.com/desktopcurtain/
Or use full screen mode. Hit the 'f' key.

My iphone 6 wont go past the start up screen (white screen with black apple) iv treid restoring it on itunes but it disconects its self half way through

my iphone 6 wont go past the start up screen (white screen with black apple) iv treid restoring it on itunes but it disconects its self half way through. what can I do

Did you try to use recovery mode, explained in this article?
If you can't update or restore your iOS device
If it does not work after that, you'll have to get it serviced:
iPhone - Contact Support - Apple Support

Macbook pro won't go past start up screen

i started up my macbook pro today and it opened but couldn't scroll with the trackpad. force quitted (start button) it and then tried to start up again. this time i didn't get past the start up screen (with the apple logo and spinning timer). i then tried to reset pram (cmd+option+p+r), safe mode and a number of other possibilities to no avail. next step was using the instal disc and running disc permissions + repair. again to no avail. i even tried the terminal and tried fixing the disc repair report that it was a invalid sibling link. here's a link to the procedures; http://hints.macworld.com/article.php?story=20070204093925888. i got the message from terminal that the disc is corrupted and i've now run out of tricks/options to get my macbook pro up and running. has anyone here in the community know any other avenues i could travel down. all help of course would be much appreciated. the computer affected is my new 13 inch 2.3 ghz i5 macbook pro.
cheers, Jan

instal disc and running disc permissions + repair.
You need to boot from the install disc and run Disk Utility to verify and if necessary, repair the startup disk.
Insert your install disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu and launch Disk Utility.
(In Mac OS X 10.4 or later, you must select your language first from the installer menu)
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your startup disk and click Restart
While you have the Disk Utility window open, look at the bottom of the window. Where you see Capacity and Available. Make sure there is always 15% free space.

No start up screen

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