Dear Jean, I have been using Lilypond for some 10 years; first 2.12.3, then 2.18.2. I just bought a new MacBook Air, which uses the new 64-bit M2 chip. I understood I could not use the 2.18.2; that the 64-bit chip required the “unofficial” version 2.20.0. So I loaded that, and it runs all the tunes that I tried. But it is very difficult to write new music. It is proving very hard to work out what some of the problems are. [1]. There is some new language to learn, new ways to do things. But the manuals v2.22.0, and v2.22.2 help and I am learning. [2] There are some baffling problems. It seems that the single apostrophe (used to raise the pitch by one octave) on the keyboard does not work. But, if I copy-and-paste from the manual, I can get round that problem. [3] The header section is absurdly sensitive. I can paste in from the manual: \header { title = "SUITE I." composer = "J. S. Bach." } and it works. But my piece is by Monteverdi. I can change the title to “Take not my treasure”, but I cannot change Bach to Monteverdi. !!!
Yours sincerely, Ian West P.S. Unofficial 64-bit application bundles for macOS 10.15 are available at https://bintray.com/marnen/lilypond-darwin-64 <https://bintray.com/marnen/lilypond-darwin-64>. --- Ian West 9 Thenford Road, Middleton Cheney, BANBURY, OX17 2NB, Tel: 01295 713 889; (Mobile: 07474 572 588) ==================