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Thanks everyone for the thoughts and suggestions. I think it has to be some sort of resonance given how it responds to mouse clicks, system activity etc. I'm going to leave it for a few days and see how much it actually bothers me. I do have another imac g4 that has more significant problems...

Got an 800 Mhz 17" imac G4. Opened it up, installed a new battery and an SSD drive (OWC Mercury with IDE->SATA). Reapplied thermal paste; closed it all up. Installed OS 9.2.2 Everything works great except it makes this buzzing sound, almost like the sound a hard drive would make doing disk...

All interesting ideas on the screen.  The truth is 640x480 scaled on this 1024x768 LCD is pretty good looking.  The biggest issue with it (and it isn't a huge one) is the stippling on the original CRT glass.  If I had a wish it would probably be for a smooth, clear glass front.  That said, it's...

The emulation is fine.  I haven't played Shufflepuck on it, but crystal quest runs just fine.  I'm using the SDL version of basilisk ii -- this is my config, but its pretty standard: displaycolordepth 8 rom /home/pi/mac/PERFORMA.ROM disk /home/pi/mac/HD20Sys75.dsk disk...

I've found 640x480 is really the sweet spot at this size.  I run basiliskII and vMac at that res at they are both able to fill to fit the screen (1024x768).  basiliskII handled it automatically.  vMac I had to play with the compile time options (or do it manually via the "ctrl" menu).

Another update -- I wanted to re-create the startup sound of the Mac Plus.  It bothered me to flick the power switch and _not_ hear the familiar "boing".  So I wired in this Ada Fruit sound board with a recording of the Mac startup chime and some floppy disk...

Well, one more thing...

A few final things since I'm going into details: Audio: the 3.5mm out from the Pi wasn't powerful enough so I used this hat for an amp - https://www.amazon.com/gp/product/B07CZZ95B9/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 Wifi: I was worried that the case would block the wifi...

Keyboard and mouse: I used Tinkerboy's USB adapters Keyboard: https://www.tinkerboy.xyz/product/tinkerboy-m0110-keyboard-to-usb-converter-for-the-apple-macintosh-128k-512k-plus-keyboard/ Mouse: https://www.tinkerboy.xyz/product/tinkerboy-m0100-mouse-to-usb-converter/ To keep the external...

The floppy drive:  1. I found an SD to USB drive that I could pop the top off of to allow the floppy drive's mechanism to seat "down" on it.  I don't know the model I used--I just had one lying around.  I've attached a picture. 2. It had a little "presence" detector that was normally actuated...

That should work.  I used this - https://www.amazon.com/Dremel-EZ545-2-Inch-Diamond-Wheel/dp/B000Y4ZTFS/ref=sr_1_7?dchild=1&keywords=dremel+diamond+cutting+wheel&sr=8-7

In terms of cutting the glass, there's obviously always some danger in messing with CRTs, so do at your own risk and only if you are comfortable.  That said, the basic steps were: 1. Wrapped it in a heavy towel and broke off the vacuum nipple at the very back end/narrowest part of the CRT to...

Here are links to the videos on YT: Color mac plus - 

When I was a kid, I always wished my Mac Plus had color. Thirty years later... Really just another Pi in Mac case project. A few things I did differently: All the external ports are unchanged. You can plug in and use an original keyboard and mouse. (Tinkerboys USB adapters are soldered on the...