startup problem

Hello. I have a Macbook Pro 2010 running High Sierra. I changed the HD for a SSD and upgraded RAM a few months ago and it was working fine. Today I turned it on and it chimes shows the apple logo and loading bar then it turns off, then it turns on and does the same. I've tried: - Apple...

So, I was thinking of upgrading my early 2009 Mac Pro 4,1 Nehalem dual Quad-Core 2.26GHz to a Westmere 12-core but before getting my hands on such CPUs I thought I’d try out a couple of x5570 2.93GHz quad-cores (lidded, fitted with washers and 5mm thermal strips, I happened to have laying...

My husband and I replaced our 6 yr old MacBook Pro's in November 2016 and have BOTH been getting major graphics problems on screen at startup. The screens simply flash with weird graphics. We have been to Apple shop and had a GeniusBar appointment. We showed them videos of what our laptops...

I've trolled this forum and many others for potential solutions, all unsuccessful. My machine is a 15" 2011 MBP (Core i7, 16 GB RAM) running El Capitan. I was in the middle of a session when my computer spontaneously went to a gray screen. I initially suspected hardware problem. After rebooting...

So looking for a solution to this one. Getting desperate. For a few days now, every time I start my MBA, I get no contents in my Mail messages (title bars normal), Safari (nothing doing, white pages; no progress bar, nothing loading; other browsers are working), and blank pages for the 5 tabs in...

Hi, I will honestly pay anyone who can help me with my Macbook Pro issue. When I turn on my mac, it turns of by itself during start up. After googling the issue, I started the mac while holding down the "fn" button. As long as I held down the "fn" while logging on to my computer it worked, but...

Hello! I'm new to the forum and am at a complete loss as to what to do. Last year, the hard drive on our macbook gave out, so we had that, along with the battery replaced and the RAM upgraded. Fortunately, we were able to keep all of our data and the repair guy set up time machine for us and we...

Hi, a friend brought round his mac book pro which was stuck in recovery mode and would not install the os (yosemite). He said he wanted it wiping as he was going to give it to his son. I created a bootable el capitan usb disk using my mac which seemed to work fine, the mac saw the drive and the...

I have a mac pro tower 1,1 (which has had various upgrades done by the previous owner). The Mac has started to have some intermittent issues at start up. When booting up sometimes horizontal lines are appearing across the screen, and then it's either hanging on grey screen or blue screen...